副詞 at a time:

1. simultaneously
   同義詞：at once, at one time

1. Personal enmities must be forgotten at a time of national crisis.
   民族危機當頭，必須捐棄個人恩怨。
2. Such waste of money should be deprecated at a time like this.
   在這種時候應(yīng)大力反對如此浪費金錢。
3. He used to abandon his work for months at a time.
   他過去每次放下工作就是幾個月。
4. If only problems would come one at a time!
   要是問題一次只發(fā)生一個該多好！
5. He tossed the peanuts into his mouth one at a time.
   他每次將一粒花生扔進嘴里。
6. Female sheep produce one or two lambs at a time.
   母羊一次生一到兩只羊羔。