mushroom valve；poppet valve是什么意思

用法例句

It is found the cell morphology plays an important part on organic acid concentration and lovastatin production.

对土曲霉(Aspergillus terreus)产洛伐他汀过程中胞内外有机酸浓度进行测定,发现菌形对发酵过程胞内外有机酸浓度和洛伐他汀的产量有很大的影响。

It is simple, convenient, and easy to use; moreover, it could observe bacterial morphs on different growing stages in detail on the same slides.

发现了一种新的、不同于常规涂片法的观察微需氧细菌、兼性厌氧细菌或厌氧细菌形态的制片法。