be present to

be present to 基本解释

出现在……之中

be present to 用法和例句

1、A remote emergency shutdown device must be present to shut off silane at the source.

必须有遥控紧急切断装置来在源头处切断硅烷气流。

2、Adequate ventilation should be present to prevent accumulation of flammable vapors during spraying operations.

进行喷涂作业时, 应有良好的通风, 以防易燃蒸汽积聚。

3、The monitor has informed us that everyone must be present to fill in the diplomas which will issued to us.

班长通知我们，今天他要填发毕业证书，要求每个人都必须到场。

重点词汇

present adj. 现在的；目前的；出席的；[语法学]现在时的 n. 现在；礼物；瞄准