In the middle of last century, plant female sterility research have begun, but in the early stage, research mostly limit to embryology and cytology.

Throughout the 20th century, plant sciences have experienced from descriptive botany, experimental botany to a modern discipline with many intercrossing branches.

20世纪植物科学经历了描述植物学、实验植物学到现代植物学的发展，形成多个系统的植物学分支。

How to disinfect for the American aloe?

怎么给美国芦荟消毒？

Under what temperature does American aloe need to train?

美国芦荟要在什么温度下培养？

During 1911 to 1937, an outstanding phenomenon in Hebei Shandong and Henan was that, a large number of peasants left their own village to seek a new means of livelihood.

农民离村问题，是1911&1937年冀鲁豫农村突出的社会问题。

Father left home to seek a livelihood when young and did achieve quite a few things all on his own. Ian was cast loose at an early age to make his own way in the world.

他少年出外谋生，独力支持，做了许多大事。伊恩年纪很小的时候就漂泊在外独自谋生。

Father left home to seek a livelihood when young and did achieve quite a few things all on his own.

他少年出外谋生，独力支持，做了许多大事。

Dynamic sintering and digest of crude material with low al/ si ratio& its test

低铝硅比生料动态烧结和溶出试验研究

Test Investigation on Preparing Recycled Concrete Using Waste Concrete as Crude Material

用废砼作粗骨料配制再生混凝土的试验研究

As an industrial crude material or novel fuel, these hydrogen gases may be directly applied also.

氢气也可以作为工业原料或新型燃料直接应用。

Phenothiazine is an important fine chemical product and crude material.

吩噻嗪是一种重要的精细化工产品和原料。

On the tip of a tree which had lost all its other leaves, two still remained hanging from one twig: Ole and Trufa.

在一棵其它叶子都落了的树梢上，还有两片挂在一根细枝上：这是奥立和特鲁法。

Its outside appearance is observed by transmission electron microscope and its structure is characterized by infrared spectrum and X ray diffraction.

用透射电镜（TEM）观察表面形貌，用红外光谱（IR）和X-射线衍射（XRD）表征其结构。

Ways to Improve Outside Appearance of Welded Parts on Bulldozers

提高推土机焊接件外观质量的途径

Outside Appearance Control for the Concrete Structures of Brick-Concrete Residential Buildings

砖混住宅楼混凝土结构外观质量控制

What people value is not based on outside appearance ( 6).

人们所重视的并非一个人的外表。

Financial pundits tell us that the market has now managed to climb up and over the wall of worry, better known as the'resistance'level.

金融专家告诉我们，市场已经设法爬上以上的担忧之墙，更好地为'抵抗'水平众所周知的。

He got so nervous that he almost wanted to climb back over the wall and run home.

他变得紧张不已，几乎想爬回墙的另一边跑回家。

Some residents tried to climb over the wall that surrounds the neighborhood, but the floodwater was so powerful that some parts of the wall looked as if they were about to collapse and could not support them. The residents stayed on the roofs.

有些居民试图爬到附近的围墙上去，但洪水非常汹涌，一些围墙看起来即将倒塌，不足以承受人的重量。

Give me a leg up and I'll climb over the wall.

帮我一把，我就会爬过墙去。

Teacher, I caught him trying to climb over the wall.

老师，我抓到他爬墙。