Let them climb, dig trenches, build Bridges and use parachutes.
让它们攀爬，挖沟，架桥和使用降落伞。
During the planning phase, I let them climb a ladder to the mark on the trunk where the floor would go.
在整个规划设计阶段，我让他们爬上梯子在树干上标记下将要架设树屋地板的地方。
They're really impressive, but please remember not to let your children climb on them.
它们的确很棒，但请记住不要让你的孩子爬上去。
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