1、The petroleum ether extract gave 100% mortality in shortest time followed by ethyl acetate extract.
從作用時間上看，石油醚組分作用時間最短，乙酸乙酯組分次之；

2、Mainly by tobacco bud extract petroleum ether extract obtained tobacco bud extract.
烤煙花蕾浸膏主要是通過石油醚浸提烤煙花蕾制得浸膏。

3、It is soluble in such organic solvents as acetone, ethylether or petroleum ether instead of water.
易溶于 * 、或石油醚等有機溶劑，不溶于水。

4、This paper studied on oat oil from deshelled oat seeds by petroleum ether extraction.
本課題以脫殼燕麥為原料，經(jīng)石油醚提取得到燕麥油。

5、Petroleum ether extract content increased.
石油醚提取物含量有增加。

petroleum ether翻譯