First of all, work is being done to the system on the left-hand side.

首先，对左手边的系统做功。

youdao

OK, so w, first of all, work is being done to the system on the left hand side here.

好的，首先,我们通过左边对系统做功。

youdao

Note that the coordinate system starts in the upper left hand corner.

请注意，坐标系统从左上角开始。

youdao

Note that the coordinate system starts in the upper left hand corner.

请注意，坐标系统从左上角开始。

youdao