下流胚子的英文：
Bottom feeder
n. 底部；末端；尽头；臀部
adj. 底部的
v. 装底；建立基础；到达底部
reach the bottom
到达底部
Get to the bottom of
弄个水落石出
Look, the bottom is bubbly!
看，鞋底有有很多泡泡呢！
plow bottom for sod and clay
草皮粘土地犁体
general-purpose bottom
通用犁体
n. 饲养员；奶瓶；喂食器；支流；支线
Gross feeder likes gross food.
滥食者爱吃粗食。
The feeder discharged feed into a trough for the livestock.
给料器把饲料注入一个食槽供牲口吃。
Please turn pages over and place in the document feeder.
请翻转页面并放置在文档送纸器中。
In this image, a feeder weighs the cub during a physical examination.
这幅图中，饲养员在体检过程中给幼崽称重。
The barnacle and the clam are two examples of filter feeders.
藤壶和蛤类是滤过觅食者的两种例子。