But the propellant that launches projectiles from gun barrels is not .
但是协助发射弹从枪管发射的推进剂却没那么安分。
A protest in the city 's central square turned violent after anarchists threw rocks and other projectiles at police .
在无政府主义者朝警方投掷石块和其它物体之后,雅典中心广场举行的这次抗议活动演变成了暴力冲突。
Those added projectiles can create more destruction as they crash into other objects .
这些增加进来的抛体在撞到其他物体时会产生更多的破坏。
State officials asked residents to bring political lawn signs indoors , so they wouldn 't become projectiles .
各州官员要求居民把草坪上的政治标语拿回室内,以免被狂风卷走。
This craft would be able to derail any incoming comets or other outer-space projectiles that might be hurtling towards earth , and change their trajectory just enough that they miss us .