Do more than one goal, but keep them simple.
同时做超过一个的目标，但每一个都不要复杂。
And they can teach them several simple rules to keep them safe.
他们可以教孩子几个简单的规则，以保证孩子的安全。
Keep actions simple and straightforward so users can easily understand and remember them.
保持操作的简单和直接，因此用户能够很容易地理解并记住他们。
If you must use more than one tool, keep them small and simple.
如果你必须用一件以上的工具，那就让它小一点，简单一点。
If you must use more than one tool, keep them small and simple.
如果你必须用一件以上的工具，那就让它小一点，简单一点。
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