one by one

He ticked the items one by one.

他把这些项目个个标出记号。

The doorman allowed the people in one by one.

看门的让们个个进去。

She read all of Agatha Christie’s novels one by one.

她逐读完了阿加莎·克里斯蒂的小说。

One by one the guests left.

开了。

Needle slot on the neilsbed armor plate is usually milled one by one by milling machine controlled manually.

针床钢板上的针槽通常是由工控制用铣床条条铣出来的，费工费时，铣槽精度低。