检查电缆有无开裂、擦伤等现象，如有损坏应及时调换，以防漏电。

Cable, is checked whether or not cracking, abrasion and other phenomena, if the damage should be reversed to prevent leakage.

youdao

如有更多关于北极光声音的信息，人们便能全面地了解这种现象。所以，如果你看到极光，记得竖起耳朵倾听。

More information about the sounds of the northern lights could lead to a more complete understanding of the phenomenon. So if you see an aurora, keep your ears open.

youdao

要检查各管道、阀门、连接胶管等处有无渗漏现象，如有则应及时修复。

To check the pipes, valves, connections, such as whether there is leakage of hose, if any, should be promptly repaired.

youdao