本提升机的牵引机构是两根环形链条。
随着最近几年草根环境意识的复苏，对堆肥的兴趣被重新激发起来了。
The interest in composting has been sparked anew with the revival of grass-roots environmental concerns of the last several years.
一种武器，有一根环状的带子，其中放有一块石头，抡开后让石头飞出去。
A weapon consisting of a looped strap in which a stone is whirled and then let fly.
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