B1 a small plastic or rubber object with two or three metal pins, attached to the end of a wire on a piece of electrical equipment and pushed into a special opening in a wall to connect the equipment to a supply of electricity插头

mainly UK informal an electric socket插座

US UK jack plug a metal pin at the end of a long wire joined to a piece of electrical equipment and used to connect it to another piece of electrical equipment单孔插头，插塞

informal forspark plug (ENGINE) 火花塞（spark plug的非正式说法）

B1 a small piece of rubber, plastic, wood, etc. that fits into a hole in order to close it塞子，栓子

B1 a round piece of rubber or plastic that fits into the hole in a sink or a bath（洗涤槽或浴缸的）塞子，栓

a small piece of plastic or wood that you put into a hole in a wall before putting a screw into it（打入墙上孔内以拧进螺钉的）螺钉楔子，螺钉栓塞

a small piece of material such as cotton wool, twisted or pressed tightly so it is firm棉球，药棉

the act of telling people publicly about a product, event, etc.宣传；推荐

to advertise something by talking about it a lot or praising it, especially on the radio or television（尤指通过广播或电视）宣传，推广

US slang to shoot someone with a gun射击，射杀

to fill a hole with a piece of suitable material堵；塞；填