It is not hard to operate automatic machines.

操作自动机器并不难。

youdao

David: Wow, it's fantastic. I guess it must be very hard to operate machining centers.

大卫：哇，太神奇了。我猜加工中心肯定很难操作。

youdao

Rim is for use with hard to operate gate, globe and Angle valves in overhead locations.

对于高度超过头部，操作困难的闸阀、截止阀和角阀，可以采用巴氏可调节锤击链轮。

youdao

You also are on your own when navigating hearing-aid providers, where you risk paying too much for hearing aids that make your life miserable because they don't fit, are hard to operate and overamplify background noises.

WSJ: Conquering Retirement: Hearing-Aid Shopping Tips

Centrifuge machines are hard to operate.

ECONOMIST: Something new to worry about

Recent experience in Afghanistan, for example, has shown how hard it is to operate the basic elements of even a primitive economy in a country which has been torn apart by war.

ECONOMIST: Helping Iraq, and the world, to recover | The