每两周做一次计时测验，尝试去挑战你之前的时间，并追踪你的进程。

Do the time trial every two weeks or so; try to beat your previous time, and track your progress.

youdao

每两周做一次计时测验，尝试去挑战你之前的时间，并追踪你的进程。

Do the time trial every two weeks or so; try to beat your previous time, and track your progress.

youdao