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It has to be tall because it is like a giant block and tackle, and we have to lower into the ground NEW CONCEPT ENGLISH-BOOK FOUR and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.

井架必须很高，因为它像一个巨型滑轮组。我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

It has to be tail because it is like a giant block and tackle, and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom

井架必须很高，因为它像一个巨型滑轮组。我们必须把很大的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

It has to be tall because it is like a giant block and tackle ,and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are roated bu an engine at the top and are fitted with a cutting bit at the bottom.

井架必须很高，因为它像个巨型滑轮组。我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

It has to be tall because it is like a giant block and tackle, and we have to lower into the ground and haul out of the ground great lengths of drill pripe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.

钻井必须很高，就象一个巨大的滑轮。我们必须降到地下然后将钻杆拔出来。钻杆的顶端有一个马达使它旋转而底部是一个尖头。

They are also rooted in societal indifference and individual callousness—the desire among those at the top of the social ladder to maintain their wealth and status whatever the cost, as well as the despair and self-destructiveness among those at the bottom of the social ladder.

他们也是由社会冷漠和个人漠不关心引起的——在社会阶层最上层的人为保住他们财富和地位而不择手段的欲望，还有在社会阶层最下层的人的自毁倾向。

But over the coming days, expect to see the cautious, camera-shy South Korean at the centre of some spectacular snaps: watching the glaciers vanish at the bottom of Patagonia, flying to the finger of land that juts out of Antarctica and then heading for the vibrant heart of Brazil's forest.

但在接下来几天，人们可以看到这位谨慎的、不喜欢拍照的韩国人成为某些引人入胜的照片的主角：观察冰山消失在巴塔哥尼亚的水底，飞往南极洲突出的一块狭窄之地，然后前往巴西雨林中充满活力的中心地带。

Tungsten metal at the bottom of the design, leading-edge design of a lower technological level of different players can be hit more easily to the sweet spot, as at the same time, double ball design to ensure that the club and ball touch the grass, so as to achieve a more successful hit .

钨金属底部设计，更低的前缘设计使不同技术水平的选手都能更轻易击到甜蜜点，以此同时，双重球设计确保球杆与草的击球触感，从而达到更成功的击球。

Embryo 7 weeks, Maxillary Tunisia Tunisia at the top connected to the formation of nasal and nasal Department, in the middle and small ball connected to the formation of Tunisia at the bottom of the nose and upper lip, two small balls connected to the formation of Tunisia in the midline nasal columella, lip people and ex-jaw.

胚胎第7周时，上颌突在上方与鼻侧突相连形成鼻侧部，在中线与小球突相连形成鼻孔底部和上唇，两个小球突在中线相连形成鼻小柱、唇人中和前颌。

And we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.

我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

Air and light debris change direction abruptly at the bottom of the rear deflector and exit through an inlet area and upwardly directed path at the back of the deflector.

空气和轻的碎屑在弯曲的后导流器的底部突然改变方向并且经在导流器背部的朝上的空气出口离开。

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。