pullups
美
英 
例句
My boys climb trees while I do pullups and (admittedly rudimentary) gymnastics from a low branch.
我的孩子們爬上樹,而我則用較低的樹枝做引體向上(相當業(yè)余)和體操。
Because Ports 1, 2, and 3 have fixed internal pullups, they are sometimes called "quasi- bidirectional" ports.
因為端口1、2、3有固定的內部上拉,所以有時候他們被稱為“準雙向”口。