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

A signal is simply any physical quantity whose magnitude and variation with time (or occasionally some other variable) contain information.

信号是任意自然物理量随其规模和时间(或其他一些随机变量)的变化而包含的信息。

youdao

Through this research, a new effective way could be found to make high-value use of the large-quantity-reclamation old corrugated container which had a fine physical ability of fiber.

通过研究为回收量大、纤维物理性能良好的废瓦楞箱纸板原料的高值化利用提供了一条新的有效途径。

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