In order to relate turning these physical knobs to this quantity, which we don't have a very good feel for, we've got to have a feel for the slopes.

为了把这些物理量同我们不是很理解的这个量联系起来，我们必须对斜率有一定的了解。

youdao

And, along with physical activity, food quality is just as important as quantity, he says.

而且他说，与身体锻炼一样，食物的质量和数量同样重要。

youdao

And neither the purchase nor the sale changes the physical quantity of the commodity available to the market.

期货也改变不了市场上可购买的货物的物理数量。

youdao

OK, but in order to relate turning these physical knob to this quantity here, which we don't have a very good feel for, we've got to have a feel for the slopes.

热量是怎么进一步改变的,但是为了把这些物量同我们，不是很理解的焓联系起来，我们对微分已经有了一定的了解。

麻省理工公开课 - 热力学与动力学课程节选

They have a tough group with the world champions - and in my opinion the best team in the world - Brazil, a brave and physical Norwegian side and the unknown quantity of Morocco.

BBC: Confidence is key for Scotland

Confirming this strain on physical silver supplies, just this morning the RCM went on allocation, limiting the quantity of sales of the popular Silver Maple Leaf coin.

FORBES: Royal Canadian Mint 'Managing' Silver Supply