He felt rather awkward in presence of ladies.

他在女士面前有些窘。

How empty is theory in presence of fact!

跟事实一比，理论就显得太空洞了。

Corrosivity Corrosive in presence of copper.

腐蚀性对于铜会产生腐蚀性。

The comments were made in presence of Pope Benedict by one of his inner circle.

在教皇在场的情况下，教皇核心集团一名成员发表了该评论。

The remained enzyme activity of TGase in presence of glucose is only increased 25 %.

加入葡萄糖后，酶活残留率提高25%左右。