盘旋的

Three minutes later, it spiraled nose-first into the Rockaway Beach section of Queens - a middle-class neighborhood, 15 miles from Manhattan.

这里"spiral nose-first"很形象地描绘出当时飞机头朝下，盘旋坠落的情景。Spiral的意思是"盘旋向下"，nose-first顾名思义就是"鼻子在前"了。

To give you a simple idea, one can say for instance that a paraglider usually turns with a radius of 2 wingspans, where a hang-glider and sailplane turn respectively with a radius of 3 and 4 wingspan The speed ratio between the left and right wingtip is from the above example; 2 for a paraglider but only 1.5 for a hang-glider and 1.3 for a sailplane.

为了比较简单的说明，这里以实例进行说明：滑翔伞以2倍翼展的半径稳定盘旋，而悬挂滑翔机和固定翼滑翔机以3，4倍翼展进行稳定盘旋。

But they're saying this is a unidentified flying object, low in the sky over the world's second-busiest airport.

但是他们说那是个不知名的飞行器，盘旋在世界上第2繁忙的机场的低空中盘旋。

Spikelets all alike, somewhat laterally compressed, with 1 to several fertile florets; rachilla usually disarticulating below each floret, occasionally strictly 3 florets with lower 2 staminate or barren and of different appearance from upper fertile floret, then disarticulating above glumes and florets falling together; glumes persistent, often equal to spikelet or at least longer than first floret, commonly membranous with broad, shining, hyaline margins; floret callus bearded; lemmas hyaline to leathery, 3- to several-veined ( Coleanthus 1-veined), apex entire or denticulate, awned from back, rarely awnless; awn usually geniculate with twisted column; palea hyaline, subequaling or much shorter than lemma.

全部一样的小穗，有点侧面压扁，具1到数个能育的小花；脱节的通常小穗轴在下面每小花，偶尔严格加雄蕊或者无意义的更低的2的3小花和上面肥沃小花的不同外表，然后脱节的上述颖片和小花结合起来；宿存的颖片，等于小穗或长于前小花，宽的膜质具，发亮，透明边缘的通常的至少的通常；公然反对的小花结茧；透明的外稃到革质，3-到数枚脉(Coleanthus 1脉)，先端全缘或具小齿，从背面，很少awnless那里具芒；用盘旋的柱子通常膝曲的芒；透明的内稃，近相等或者远短于外稃。

Spikelets 5–6.5 mm, green tinged purple; glumes glabrous or rarely setose, scaberulous along veins; lower glume 4.5–5.5 mm, 3 (–5)-veined; upper glume 5-veined; lower floret staminate or barren, shorter than glumes or equaling lower glume; upper floret 2.5–3 mm, lemma apex awned, awn flanked by 2 slender erect bristles; bristles mostly 1–2.5 mm; awn geniculate with brown twisted column, 6–10 mm; callus hairs 1/4–1/3 length of lemma.

微染的小穗5-6.5毫米，绿色紫色；颖片无毛的或很少具刚毛，微糙的沿脉；更低的颖片4.5-5.5毫米，3(-5)脉；上面颖片5脉；无意义的下部小花雄蕊花或，短于颖片或等长下部的颖片； 2纤细的直立刚毛从侧面包围的上面小花2.5-3毫米，外稃先端具芒，芒；多数的刚毛1-2.5毫米；用棕色的盘旋的柱子，6-10毫米膝曲的芒；胼胝体毛1/4-1/3段外稃。

The sadness of life was everywhere and in the blue sky, high in the air, were the heavy-winged vultures, circling without moving their wings, circling by the hour, waiting and watching.

生命的悲情到外弥漫，而在蓝天之中，在高空之中，则有羽翼沉重的兀鹰在盘旋着，没有动一动翅膀----好几小时都在盘旋着，等待着，注视着。

Three minutes later, it spiraled nose-first into the Rockaway Beach section of Queens - a middle-class neighborhood, 15 miles from Manhattan.

这里&spiral nose-first&很形象地描绘出当时飞机头朝下，盘旋坠落的情景。Spiral的意思是&盘旋向下&，nose-first顾名思义就是&鼻子在前&了。

Waves, silver beach, green palm trees, hovering sea gulls, white sails as well as thosehappy people who were either swimming at sea or playing volleyball on the beach.

似乎我又回到了风景如画的景观之中：蔚蓝色的波涛、银色的沙滩、绿色的棕榈树、盘旋的海鸥、白色的风帆，以及那些或在水中游泳、或在沙滩上打排球的欢快的人们。

The Kibo laboratory segment being deployed during space shuttle Discovery's trip to the ISS can be pressurized and contains racks of scientific experiment that will be used to explore many things, including how plants brace themselves against gravity, and how water might be inhibited from freezing in cells under microgravity.

希望号试验舱的部分组建在发现号航天飞机此次国际空间站之旅展开的，舱内可以增压，并包含被用来研究许多新事物的科学仪器，其中包括植物如何逆重心生长，以及在微重力状态下细胞内的水分如何抑制凝结。每一条走过的路，都有它不得不这样蜿蜒盘旋的理由。

Just then he saw a man-of-war bird with his long black wings circling in the sky ahead of him. He made a quick drop, slanting down on his back-swept wings, and then circled again.

就在这个时候，他看见一只军舰鸟，展开那长长的黑色翅膀，在他前方的天空中盘旋，突然之间，它将翅膀向后一收，倾身直往下伏冲，然后又开始盘旋。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。