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Thanks to their strong, curved claws, these cubs can climb from a very young age.
由于它们强壮弯曲的爪子，这些小熊在很小的时候就会爬树了。
But perfecting the technique takes time.
但想要把这项技术练得如火纯情尚需时日。
They need to learn which trees are best for gripping onto.
它们需要知道哪些树最适合攀爬。
Smaller trees and branches are good for practice.
小一点的树和树枝适合练习。
Well, most of the time.
嗯，大部分时候是这样。
This tree is too flaky.
这棵树太脆了。
This tree is too slippery.
这棵树太滑了。
But this tree is just right.
这棵刚刚好。
Going up is one thing.
往上爬是一回事，
But coming down again can require a helping hand.
想下来就是另一回事儿了，没有帮手不行。
