at sea

phr

• ① 在(看不见陆地的)海上;在航海中
  • He was drowned at sea.他淹死在海里。

• ②[常作completely [all] at sea]感到困惑的(=perplexed);不知所措的
  • He is at sea at the moment.他目前在航海中。
  • He was completely at sea as to how to answer the question.他完全不知道如何去回答那个问题。