Every time she consulted her watch, she wondered if the batteries were wearing out.
每次看手表的时候，她都会想是不是电池没电了。
They just need to show how to scale up their technology—so far they’ve tried it only on watch-size batteries.
他们只需要解决如何用这项技术做大电池的问题——现在他们只能做出手表大小的电池。
They just need to show how to scale up their technology-so far they've tried it only on watch-size batteries.
他们只需要解决如何用这项技术做大电池的问题——现在他们只能做出手表大小的电池。
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