It is, therefore, essential that a banksman be appointed to warn the operator of hazards that cannot be seen from the operator's position.

重型运土设备使用时，操作人员只能看到有限的区域，因此，必须指派矿口监工随时警告操作人员在操作位置上无法发现的危险。

youdao

But this cannot be seen to happen only on Rwanda's terms.

但这一切却无法得到解决，除非按照卢旺达的条件来办。

youdao

The solutions to real problems cannot be seen in advance.

解决实际问题的办法无法事先看到。

youdao

Investigators sometimes use chemicals and special lighting to uncover fingerprints that cannot be seen with the eye alone.

VOA: special.2010.05.05

It cannot be seen from Earth without the aid of binoculars or a telescope.

VOA: special.2011.07.27

They cannot be seen as clearly.

VOA: special.2010.05.31

The gas is known as the silent killer because it cannot be seen or smelt.

BBC: Carbon monoxide detector

This is delicate, because he cannot be seen to go behind Mr Eroglu's back.

ECONOMIST: Northern Cyprus's new president: Enter Eroglu | The

Called micro miniatures, the artwork is so small that it cannot be seen with the naked eye.

CNN: Mice on toast; eye-of-the-needle art