我把枯树枝砍掉了。
四周有许多树蕨和枯树枝。
严禁捡拾牧场内干枯树枝或毁损树木搭设营火，并请勿攀折花草及攀爬树木。
Do not start a fire with the dry branches or damaged trees in the ranch. Do not break flowers and climb on the trees in the ranch.
一个夏天，在阳光的酷晒下，枯树枝燃烧起来，于是火被人类十分偶然地发现了。
It was probably discovered by accident when the sun made something burn-perhaps a dry tree in a hot summer. Soon fire began to be used as a source of energy.
一个夏天，在阳光的酷晒下，枯树枝燃烧起来，于是火被人类十分偶然地发现了。
It was probably discovered by accident when the sun made something burn-perhaps a dry tree in a hot summer. Soon fire began to be used as a source of energy.
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