Swarming in tight packs, prey fish use strength in numbers as a defense against the rainbow runners hunting them.

被捕食的鱼紧紧地聚集在一起，用数量上的力量来防御彩虹鱼的捕猎。

The closer you get to the heart of the galaxy, the tighter the stars are packed together.

你离银河系的中心越近，星星就越紧密地聚集在一起。

There would be two gunners on either side of the helicopter and when the pilot managed to herd a group of goats together into a tight pack they would open fire and wipe all of them out.

直升机两侧各有两名枪手，当飞行员设法成功将一群山羊赶到一起，聚集成紧密的群体时，他们就会开火，把山羊全部消灭。