因此在第二秒内，速度没变。

So during the second second, the velocity is not changing.

youdao

录制音频的第一第二秒可能非常响亮。

First second of recorded audio may be very loud.

youdao

录制音频的第一第二秒可能非常响亮。

First second of recorded audio may be very loud.

youdao