我们一直在等化学品储存系统为重点最近，我们忘记其他一些老的，似乎更有效率，机械电池。

We have been so focused on chemical storage systems lately, that some us forget other old, seemingly more efficient, mechanical batteries.

youdao

和现在已有的通过解决电池极性的安装的电子解决方案不同，InstaLoad的机械电池接触器可以使用到大部分的电池盒中。

Unlike existing electronic solutions designed to address battery-polarity installation, InstaLoad's mechanical battery contacts can be designed into most battery compartments.

youdao

不过，要缩小这些飞行引擎、电池、机械促动器、中控电子装置，以使这些飞行器够轻够小地完美飞行，还是相当困难。

But it remains hard to shrink engines, batteries, mechanical actuators and control electronics to the point where they are small and light enough to fly without impairing their performance.

youdao