direct reaction是什么意思

用法例句

As a rule of sentence-making in classical Chinese verse, antithesis has its philosophical basis,which is manifest in the principle of thorough connection and exquisite combination of "yin", "yang",positive and negative sides.

属对者造语之则也,推其本法一气贯通之理、阴阳正反之道,言其用则属辞类合之则、而遣字巧构之工也。

As the run-of-mine ore has a high MgO content and the minerals therein are finely disseminated,direct-reverse flotation process was employed,while new types of collectors called MG and SR were introduced for direct and reverse flotation,respectively.

针对该矿石性质,采用正-反浮选工艺,以新型药剂MG和SR分别作正、反浮选的捕收剂,取得了混合精矿P2O5品位32。