On the bottom of most plastic packaging, there's a small triangle with a letter or a number written inside.

在大多数塑料包装的底部都有一个小三角形，里面写着一个字母或数字。

youdao

New figures from the British Association of Aesthetic Plastic Surgeons are expected to show that the number of men opting for breast-reduction procedures last year rose by nearly half.

英国整型外科医师协会新发布的数据将显示，去年选择进行缩胸手术的男性人数增长了几乎一半。

youdao

One chick, indeed, had consumed 37 bottle caps, a number of electrical connectors, several bolts, some pieces of plastic piping and even several shards of glass before dying.

其中一只雏鸟在夭折之前曾吞下了37个瓶盖、多个电源插座和一些塑料管碎片，甚至还有数个碎玻璃。

youdao

Prizes are given for planting the most trees and picking up the largest number of plastic bags.

VOA: standard.2010.04.01

Police fired a number of plastic baton rounds as rival crowds of Catholics and Protestants clashed.

BBC: NI troubles dominate summit

He has infiltrated the gang, thanks to some ingenious plastic surgery and a number of carefully constructed lies.

NEWYORKER: The TV

Officers fired a number of plastic baton rounds at rioters.

BBC: Photographer shot in second night of Belfast rioting