Be alert. 随时戒备。 Always be ready. 要随时作最坏的准备。 An ounce of prevention is worth a pound of cure. 预防远胜于治疗。 He really did his homework. 他的确是有备而来。
You really came prepared. 你真是有备而来。 This is how be paved his way. 这是他铺路的作风。
Take your positions. 各就各位。