大象听到远处动物的警报声，情绪突然发生变化。

The elephant had heard the distant alarm calls of animals and her mood suddenly changed.

youdao

可能是音高的变化使得乞食声没那么能打动人，获得的食物也随之变少，狐獴没办法就只好自谋生路。

This change in pitch might make their begs less persuasive, eliciting less food and leaving the juveniles no option but to forage on their own.

youdao

各国目前面临气候变化压力和调整代价，将越来越频繁地需要国际援助，呼救声也会越来越急迫。

These calls for international assistance will become more frequent, and more intense, at a time when all countries are stressed by the pressures of climate change and the costs of adaptation.

youdao