Don 't allow your child to play with nonpowder rifles , such as pellet guns or bb guns .
不要让你的孩子玩耍非粉类的步枪，例如弹丸枪或者空气枪。
Just before or after the transformation from larvae into adult bug , the individual releases a very stinky pellet that contains all of the built-up waste .
刚好就在从幼虫化蛹之前，个体会排出一个散发恶臭的小球，其中包裹着发育过程中所有的排泄物。
Skinner would begin a lecture by placing a pigeon in a cage with an automatic feeder that delivered a food pellet every 15 seconds .
首先，斯金纳把一只鸽子放在笼子里，内置一个自动喂食器，它每隔15秒钟就会放出一个食物丸。
The solid fuel pellet ( a ceramic oxide matrix ) is the first barrier that retains many of the radioactive fission products produced by the fission process .
固体的燃料弹（陶式氧化物母体）是第一道防护，隔开裂变过程中产生的裂变放射。
If you want to train a laboratory rat to pull a crank to get a food pellet , the reflex will be scratched in deeper if the creature is rewarded with some regularity but not all the time .
