1. 一次一个. /不要急功近利：88. Same old, same old. 老样子. | 89. One at a time.一次一个. /不要急功近利. | 90. think it twice 三思而后行

2. 一次一个人：one another 彼此 | one at a time 一次一个人 | one by one 一个接一个

3. 一次一个：23. hide among the kangaroos 躲藏在袋鼠中间 | 24. call sb. to do sth. 叫某人做某事 | 25. one at a time 一次一个

4. 一次性地 (忘记)：will leave my mind one at a time 才会一次性让我忘记 | one at a time 一次性地 (忘记) | first of all must fly 无论如何,你一定要飞

5. one at a time：oat; 每次一个

adv

1. in single file

e.g. the prisoners came out one by one

Synonym: one by oneone after another