n. blockage consisting of an object designed to fill a hole tightly
n. an electrical device with two or three pins that is inserted in a socket to make an electrical connection
v. fill or close tightly with or as if with a plug
v. persist in working hard
n. 塞子, 栓, 插头
vt. 插入, 塞住, 接插头
vi. 被塞住