This is as useful as screen door on a submarine.
這毫無用處。
瘋狂英語 900 句 談成語

?? 句中詞匯解析

從本句中提取的重要詞匯

useful ['jusfl] 詞頻1 詞根: use
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."
內存擴充卡是計算機很有用的附件。
近義：helpful, assistive, available, profitable, purposive, serviceable 反義：idle, inane, ineffective, insignificant, lousy, needless
submarine [,s?bm?'rin] 詞頻3 詞根: sub
n. 潛艇;海底生物; adj. 水下的，海底的; vt. 用潛艇攻擊; vi. 駕駛潛艇;劃入底下;
?? sub在下面+marine海洋的→在海下面→海底的；潛水艇
"Within a short time, everything on the submarine was buttoned up."
不一會兒, 潛水艇內所有的東西都扣緊了.
近義：sub, subaquatic, undersea, underwater, hero
screen [skrin] 詞頻2 詞根: sc-
n. 屏幕;銀幕;屏風; vt. 掩藏;庇護;檢查;放映;
"He nodded absently, his attention absorbed by the screen."
他專心注視著屏幕，只是心不在焉地點了點頭。
近義：hide, mask, obscure, occlude, occult, secrete
door [d?r] 詞頻1
n. 門，戶;出入口;一家[戶];通道;
?? 盜（諧音）： 門破了，東西被盜了
"I'll leave the door ajar."
我讓門半開著。
近義：doorway, entrance, entranceway, entryway

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