I want an appointment for a definite time and place.

我要一个有确定的时间和地点的约会。

youdao

Therefore, the use of furnace lining has definite time limit.

所以炉衬的使用是有一定的期限的。

youdao

Therefore, the use of furnace lining has definite time limit.

所以炉衬的使用是有一定的期限的。

youdao