The high collecting strength and good selectivity of T-2K is explained using the theory of hard soft acid base and the theory of frontier molecular orbit.

用硬软酸碱理论和前线轨道理论解释了T -2K的高捕收能力和强选择性。

youdao

HONIC 400 is not only recommended for cylinder honing on hard, soft and close-grained cast iron but also for flat honing and lapping operations on gauge blocks and gudgeon pins.

雄力400不但推荐于硬质及软质铸铁的汽缸内径搪磨，还适用于块规的平面精磨及轴头销的研光工序。

youdao

Sure. What about this brand? It is supposed to be very good. They come in hard, soft and medium.

好的，这种牌子怎么样？挺不错的，分硬毛、软毛和中毛三种。

youdao

The kinds of minerals in clay affect how soft or hard it is to work with.

VOA: special.2009.09.09

I would say, part of what we look at are hard quantitative factors, but probably more important than the numbers are the soft qualitative attributes.

我想,我们看重的,是一些硬性的量化因素,这可能比那些抽象的特质属性,更为重要

耶鲁公开课 - 金融市场课程节选

I'm the heterogeneous system, soft stuff, hard stuff, liquid stuff.

我是非均匀系统，有软的物质，硬的物质，液体物质等。

麻省理工公开课 - 热力学与动力学课程节选

Hard or soft, commodities have fuelled desire, greed and war since the days of Pharaoh.

FORBES: Previous Post

And then there's glass and hard and soft plastics, and paper, and card and tin foil.

BBC

The second was a tension between science and the humanities, or between hard and soft subjects.

ECONOMIST: A defenestration at Harvard: The Summers also sets | The