adj. 有用的,有益的,有帮助的;令人满意的;
💡 use用+ful可…的” →有用的
"The memory expansion cards are useful adjuncts to the computer."
内存扩充卡是计算机很有用的附件。
近义:helpful, assistive, available, profitable, purposive, serviceable
反义:idle, inane, ineffective, insignificant, lousy, needless
n. 发送, 派遣, 发射, 信件, 神赐, 天降\\n[计] 发送
近义:remission, shipment, dispatch, remittent