■ exposed to

直译是“暴露”，但也可以表示非自己主动的“接触”。

• It was later established that both children were exposed to cocaine during the pregnancy.后来查明，两个孩子在母胎期间都曾经接触过可卡因。

• attention
• attention 与 caution
• at that
• at the cost of
• at the expense of
• attitude
• attitude
• attitude 与 posture
• attorney
• at..., we
• at 与 in
• audience
• autograph
• available
• avenge
• avenge 与 revenge
• average
• average, median, mean
• avoid
• avoid
• avoid 与 prevent
• await
• aware
• aware
• awareness