There are some 2, 000 species of seastars living in the world’s oceans, and many wear striking colorsthat provide camouflage or warn off predators.
世界各地的海洋中有约2000种海星。其中许多都披着眩目的色彩，为自己提供保护或警示捕食者。
When a territorial animal or bird intrudes on the territory of another creature of the same species, the latter will only perform some hostile gestures to warn off the intruder.
当地盘性的动物或鸟类侵入别的同类动物的领地时，后者只会做一些表示敌意的姿态以吓跑入侵者。
The police officer pressed two passersby into service to warn off traffic.
警察临时将两名路人找来协助指挥交通。
The police officer pressed two passersby into service to warn off traffic.
警察临时将两名路人找来协助指挥交通。
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