质量控制

It is motile and is produced in an antheridium, except in certain gymnosperms (e.g.Cycas, Ginkgo) in which antherozoids develop from the generative cells of the pollen tube.

除了在一些由花粉管的生殖细胞产生配子的裸子植物中（铁树 Cycas，银杏 Ginkgo ），通常是由精子器产生的并且会游动。

You must, you must send away this friend of yours.

你必须，你必须把你的朋友送走。