他修剪枝叶时，教他们怎样把大树枝砍成烧火用的木材，怎样将小一点的树枝捆成柴火。
When he pruned, he showed them how to cut large branches into fireplace logs and how to bind smaller branches into fagots.
(试想，你正试着用一台远程控制的割草机来修剪你的草坪，并需要通过摄像机观察、校准)。
Imagine trying to mow your lawn with a remote controlled lawnmower and a fixed video camera.
用锋利的剪刀修剪头顶的长发。
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