In those days, to make a call, you had to wind a handle at the side of your telephone.

那些日子你要打电话就得转动电话机旁的手柄。

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In those days, to make a call, you had to wind a handle at the side of your telephone. This produced enough electricity to make your call.

那时，你要打电话就得转动电话机旁的摇柄，才会产生足够的电供你打电话。

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‘If you’re going to loft a helium balloon to 20km you’d need have to have a very good handle on what the wind is doing at these elevations.’

如果你要在20公里的高度使用氦气球，你必须能很好的处理在那样的海拔高度的风的影响。

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But if you can handle some woodworking and fiberglass mending yourself, you could wind up with a real steal.

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As a result, a system using wind and solar has to be built with sufficient system capacity from conventional sources to be handle the system full load without the wind and solar systems.

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