The birds cannot afford to relax their vigilance against predators.鸟儿不敢放松对捕食者的警戒。Constant vigilance is necessary in order to avoid accidents.为了避免意外事故,必须经常保持警惕.Never relax your vigilance while you live in peace.你们要居安思危.We...
Some of the tension Altman builds up starts to sag.奥尔特曼制造的一些紧张氛围开始缓解。The shirt's cuffs won't sag and lose their shape after washing.这件衬衫的袖口洗后照样挺括,不变形。He is heavily built, but beginning to sag.他体形健壮,但肌肉已经开始松弛。...