The ring rolled down the drain

戒指───Ring;下水道───sewer

There is a ring of scum in the washbasin.───这个脸盆内有一圈污垢.

It's got a number you can ring to query your bill.───这上面有一个号码，您可以打电话查询您的账单。

We'll give him a ring as soon as we get back.───我们一回来就会给他打电话。

He has a gold ring on his finger.───他手指上戴着一枚金戒指.

I heard the doorbell ring, and went to see who was there.───我听见门铃响, 就去看谁来了.

Don't come unless I ring you up.───除非我打电话给你,否则你不要来.

In the event of fire, ring the alarm bell.───如果着火, 就按警铃.

They offer 70 hours' standby time, 2hr 50min talk time, and 15 ring tones.───这些手机可待机70小时，通话时长达2小时50分钟，并提供15种铃音。