gōngchéngshī / zhèngzài / jiǎnchá / huìyìshì / lǐ / de / diànhuàxiàn / yǐmiǎn / tōnghuà / zhōngduàn

工程师正在检查会议室里的电话线，以免通话中断。

The engineer is checking the telephone line in the conference room to prevent the call from being interrupted.