adj. 手提的;輕便的;
n. 手提式打字機(jī);
?? port拿,運(yùn)+able能…的 → 可攜帶的
"The portable device easily knocks down."
這種輕便裝置容易拆卸.
近義:laptop, notebook, movable, portative, transportable, conveyable
反義:irremovable, nailed, pinned, secured, set, standing
adj. 有用的,有益的,有幫助的;令人滿意的;
?? use用+ful可…的” →有用的
"The memory expansion cards are useful adjuncts to the computer."
內(nèi)存擴(kuò)充卡是計(jì)算機(jī)很有用的附件。
近義:helpful, assistive, available, profitable, purposive, serviceable
反義:idle, inane, ineffective, insignificant, lousy, needless
adj. 可獲得的;有空的;可購得的;能找到的;
?? avail利用+able能...的→有用的;有效的
"Doctors have an armoury of drugs available."
醫(yī)生都備有各種各樣的藥物。
近義:approachable, obtainable, attainable, open, performable, possible