The velocity's positive here still positive, positive, becomes negative negative, positive, zero, negative.

速度在这里为正，正，还是正，到了这里变成了负的，负、正、0、负。

youdao

But you have to remember in life that there's a positive to every negative and a negative to every positive.

不过你必须牢记，生活中再积极的事儿也有消极的一面，再消极的事儿也有积极的一面。

youdao

So it's a negative process-like photo images, you have negative and positive.

所以这是一个逆向进程——就像照片，有底片和正片。

youdao

Positive meaning is positive value; Negative meaning is negative value; Meaningless is worthless or non-value.

肯定性的意义就是正价值，否定性的意义就是负价值，无意义就是非价值或无价值。

youdao

Then A is positive semidefinite, negative definite and negative semidefinite.

一封好的商业书信应该是明确的、直截了当的。

youdao

Then A is positive semidefinite, negative definite and negative semidefinite.

一封好的商业书信应该是明确的、直截了当的。

youdao