燧

In the fourth chapter, some general equations are studied, of which Abel equation and some equations that have been intensively studied are the special cases.

第三章利用Abel方程已有的结果来讨论多项式系统的极限环的存在性，个数和稳定性，推广了水树良和蔡燧林的相关工作。

This article outlines the progress of ancient Chinese lenses from the Pre-Qin Period to the Five Dynasties, and discusses mainly two arguments: First, the"yangsui" recorded and narrated in Lun Heng by Wang Chong of Eastern Han Dynasty may be a plano-convex glass lens; secondly, the"four mirrors" recorded and narrated in Tanzi Hua Shu by Tan Qiao of Southern Tang Dynasty may be a plano-convex lens, a biconvex lens, a transparent planeparallel plate and a concave-convex lens respectively, but what kind of tra...

本文概述了中国古代透镜从先秦到五代的发展进程，着重从古代文献和出土文物的研究出发，结合中国古代社会经济发展水平，论证了东汉王充《论衡》中记述的阳燧可能是玻璃平凸透镜；论证了南唐谭峭的《谭子化书》中记述的"四镜"可能是平凸透镜、双凸透镜、平光镜和凹凸透镜。作者认为《谭子化书》"四镜"段可能实际上是对中国古代透镜发展的阶段性总结。

As well as making the explosion more reliable, this allowed military engineers to turn the fougasse into a booby trap.

绊索由合股细线制成，一头系在燧发装置的扳机上。

Sui's girls are usually accessorized to the hilt, and there were a few fab wheelies in a carpetbagger velvet print, but some models hit the runway sans belt, bag, or hat.

燧的女孩通常accessorized到极限，并有少数工厂wheelies在一个carpetbagger天鹅绒打印，但有些型号的击中跑道的SAN带，袋，或帽子。

To the Mogao Grottoes, Yulin Cave, represented by the ancient grotto art; togua zhou City, Bridge, Bay City, Pass, Yang Guan, Han, Ming Great Wall and more than 100 blocksfeng 燧represented the ancient Great Wall, pass the site; to Jiuquan visual , white tower, an ancient urn to represent the art of architecture; to Qi Chichiawan Dunhuang, Jiuquan, such as river Qing tombs, represented by sites, cultural sites with fire trench, Zhao Mill Road site, as well as literature and history as this century information found in the fifth-largest "home Xuanquan" sites, are the people to recall the glory days Jiuquan region.

以莫高窟、榆林窟为代表的古代石窟艺术；以瓜州城、桥湾城区、玉门关、阳关、汉、明长城及100余座烽燧为代表的古长城、关隘遗址；以酒泉钟鼓、白马塔、金塔为代表的古建筑艺术；以敦煌祁家湾、酒泉下河清等为代表的古墓群遗址，加上火烧沟文化遗址、赵家水磨道遗址以及被誉为本世纪文史资料第五大发现的"悬泉置"遗址等，都向人们追述着酒泉地区昔日的风采。

The latest thinker to pick up Hamilton's flintlock is Ha-Joon Chang of Cambridge University.

在众多现代思想家中，剑桥大学的张夏准重新拿起了汉密尔顿手中的燧发枪。

Flashes in the pan are common even if the flintlock muskets that gave rise to them are museum pieces.

如果使火药闪光的都是些博物馆的藏品燧发枪，那么"火枪冒出的仅有闪光--叫人空欢喜一场"将是平常事。

The piece of flint that provides the igniting spark in a flintlock weapon.

用来在燧发枪中击打出引火火花的火石。

The first, researching the layout of presentiment system in Ju Yan region, it is divided up satrap of shire, du wei hou guan and sui zhang.

分郡太守、都尉、候官、候长和燧长等五个等级，用略上级详下级的方法，主要是对部与燧的布局进行详尽的考证。

Industry already has developed practical methods for getting iron from taconite -- a hard, ore-bearing rock found in virtually unlimited quantities in the Lake Superior region

美国工业界已经研究出一种从铁燧岩中提炼生铁的实用办法，铁燧岩是一种坚硬的含铁岩石，在苏必利尔湖地区蕴藏丰富，简直是取之不竭。

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。