比如，有的同学买的小食品，如不对胃口就随手抛弃如果有人说这样不是太浪费了吗？

For example, some students buy snack foods, such as the appetite does not readily abandon if someone would say this is not too wasted it?

我们在蠕虫上的分子级别的发现，说明羟色胺对胃口的影响机制不同于其对代谢的控制机制。

What we've discovered here in the worm, at a molecular level, is the mechanisms that allow serotonin to have its appetite effect are different from those that control metabolism.