In old China we could not make a nail, let along (make) machines.
在旧中国，我们连一个钉子都造不了，更不用说制造机器了。
He now has an indepth knowledge of digital nail art machines.
他现在拥有的知识就论题数码艺术指甲机器。
In old China we could not make a nail, let alone (make) machines.
在旧中国，我们连一个钉子都造不了，更不用说制造机器了。%。
In the old China, we can't even make a nail, let alone machines.
在旧中国，我们连一个钉子都造不了，更不用说制造机器了。
While the idea of nail art machines seems futuristic, there are plenty of other vending-machine style devices that provide services on the go.
美甲机的想法看似挺未来派的，但现在有很多提供这种随用随买服务的自动售货机式设备。
In old China we could not make a nail, let alone (make) machines.
在旧中国，我们连一个钉子都造不了，更不消说制造呆板了。
In old China we could not make a nail, let alone (make) machines.
在旧中国，我们连一个钉子都造不了，更不消说制造呆板了。
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