uphill and downhill的意思|示意

Participants should have basic cycling knowledge and ensure that they can control the bicycles properly during uphill and downhill.

参加者应懂得基本驾驶单车技术，能掌握上斜和落斜之技术。

Uphill and downhill should be done once.

上坡和下坡应当各做一次。

The paper regards the main roof strata in uphill and downhill mining of an inclined longwall as a elastic plate.

本文将倾斜长壁仰斜、俯斜开采的老顶岩层视为倾斜弹性板。