He timed them and they average about a quarter of a second each.

数着几个字计算一下时间，平均每个数字只需要1/4秒的时间。

youdao

The impact time would probably be much longer maybe a quarter of a second.

撞击时间会长很多,可能有1/4秒。

youdao

The impact time would probably be much longer maybe a quarter of a second.

撞击时间会长很多,可能有1/4秒。

youdao