drain
单词辨析：
指排水或废液的管道。
There's something wrong with the drains.
下水道出了问题。
He has no time to repair the blocked drain.
他没时间修理堵塞的排水管。
尤指挖于地上供水流通的沟渠。
drainage channels in the farmland
农田里的排水沟
They are digging irrigation channels.
他们正在挖灌溉渠。
指挖于田边、路边等处用于蓄水或排水的沟。
He fell into the ditch in the dark.
黑暗中他掉进了沟里。
There is some rainwater in the ditch along the side of the road.
路边的沟里积了些雨水。
相关例句：
Small local stores are going down the drain.
当地的小店都倒闭了。
Don't drain the teapot dry.
别把壶里的茶滗干了。
She felt the tension drain out of her
她感到紧张情绪在消失。
As his energy drained away, his despair and worry grew
当他的精力耗尽时，他的绝望和担心也增加了。
Springs and rivers that drain into lakes carry dissolved nitrates and phosphates
流入湖中的泉水和河水携带了溶于水的硝酸盐和磷酸盐。
His usually florid complexion seemed drained of colour.
他通常红润的脸色看上去没有了血色。