Some days I feel like I can run and never stop, some days I can barely finish a 20-minute run.

有些天我感觉自己很能跑，简直不需要停下来，有些天我又只能勉强跑个20分钟。

youdao

Some days I feel like I can run and never stop, some days I can barely finish a 20-minute run.

有些天我感觉自己很能跑，简直不需要停下来，有些天我又只能勉强跑个20分钟。

youdao