keep on their toes片语

片语

1. 1

   使保持警觉、使不敢松懈、让人绷紧神经可拆开

   Surprise quizzes keep the students on their toes all semester.

   随堂小考让学生整个学期都不敢松懈。

2. 2

   使忙个不停、使不得闲口语

   Three young children certainly keep their parents on their toes.

   三个年幼的孩子确实让父母忙个不停。