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corrugated draining sheet 波纹状引流片
That maths exam I took was a regular brain drain. 绞尽脑汁的数学测验，我真是绞尽了脑汁。
The letter was written on a single sheet of paper. 这封信只用一张纸写成。
His brow corrugated with the effort of thinking. 他皱着眉头用心地思考。
It seemed that his life was draining off. 他的生命似乎在枯竭。
They were busy trenching the fields for draining. 他们忙着在田里开沟排水。
It seemed that his life was draining away. 他的生命似乎在枯竭。
The curtains were enveloped in a sheet of flame. 窗帘被火焰吞没。
Sheet in the main sail, a storm in coming! 收回主帆，风暴要来了！
The doctor wanted us to use the sheet for a shroud. 医生想让我们用床单当裹尸布。
Pull (out) the plug and let the water drain away. 拔掉塞子，把水放掉。
They are digging trenches to drain the water off. 他们正在掘沟排水。
They are digging trenches to drain the water away. 他们正在掘沟排水。
He looks at the sun through a sheet of smoke glass. 他透过一片熏黑的玻璃观看太阳。
A corrugated or perforated conducting plate in a storage battery. 极板网栅，蓄电池电极板蓄电池中呈波纹状或有孔的导电板
He tears a sheet of paper in two. 他把一张纸撕成两半。
The coffee grains plugged up the kitchen drain. 咖啡渣堵塞了厨房的排水道。
The drain is blocked and needs unplugging. 排水管堵塞了，得疏通一下。
The little boy is learning how to sheet a bed. 小男孩正在学怎样铺床单。
The bathtub drain needs repairing. 浴盆的排水管需要修理。