They had no other option but to clean the tunnel but only the parts Alexandre had already cleaned.

他们别无选择，只能清理隧道，但只清理亚历山大已经“清理”过的部分隧道。

youdao

They clean the subway cars every evening, because you know there is a lot of dirt and greens that have been picked up in the tunnel, I think we have to use a hot water system to get rid-off that.

他们每晚都要清洗地铁。因为在隧道中地铁会粘上很多灰尘和落叶，所以我们要用热水系统进行清理。

youdao

The machine also has ultrasonic waves device to clean the belt set and have temperature-inspecting mouth, tunnel cleaning mouth. It meets the requirement of GMP.

本机还配有超声波清洗网带装置 订货时定 ，并留有温度验证口及隧道清洁口。

youdao

At certain moments the air streamed against the ship as if sucked through a tunnel with a concentrated solid force of impact that seemed to lift her clean out of the water and keep her up for an instant with only a quiver running through her from end to end.

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Our correspondent says there will be serious question about how a major tunnel on one of Japan's most important traffic arteries could have failed so catastrophically, with the private company that runs the highway saying the tunnel had undergone a major inspection just two months ago and had been given a clean bill of health.

BBC: Japan Sasago tunnel: Collapse traps cars