The boys threw their hockey gear to the top of the hill and tried climbing up the path, but the sleet had created a smooth glacier.

男孩儿把他们的冰球装备扔到山顶上，然后试着沿小路往上爬，但雨夹雪已经令山坡变得更加的滑。

youdao

The three boys threw their hockey gear to the top of the hill and tried crawling up the path, but the sleet had created a smooth glacier with nothing to hold on to.

三个男孩儿把他们的冰球装备扔到山顶上，然后试着沿小路往上爬，但雨夹雪已经令山坡变得更加的滑，而且没有任何可以抓住的东西。

youdao

If you want to wear every day, the best maintenance method is to tighten the spring every two weeks, to ensure that the normal smooth running gear.

如果每天都要佩戴，最好的保养方法是每两个星期紧一下发条，保证它的齿轮正常顺滑运转。

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If you really want to get the most from your bike a smooth, reliable gear change is a must.

BBC: Sport

As in auto mode, in the manual setting you can adjust the quickness of shifts, from slow and smooth to so fast no human being could emulate the blinding-blur gear changes.

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