不同国家的木粉尘的职业接触极限值（或极限值）却不尽相同。

The occupational exposure limits (OELs) of wood dust in different countries are however not the same.

youdao

研究尿中反式，反粘康酸对苯职业接触的生物学极限。

Study the biological limit of urine trans, trans-muconic acid for occupational exposure to benzene.

youdao

我已经读了关于极限编程(XP)的许多书和文章，但是还没有接触过使用过XP的任何人。

I had read books and articles on Extreme Programming (xp) but had not been exposed to anyone who used it.

youdao