B 开头单词

be at arm's length 伸手可及

be at an end 結束

be at a stalemate 処於一個僵持狀態 陷入僵侷

be at a low ebb 衰敗

be at a loss 茫然不知

be at a loose end 不知做什麽好 閑著無事 無所事事

be at a distance of 相隔

be at a disadvantage 佔下風

be at 致力於；以…爲目標；反複要求；襲擊

be astonished at 對…感到非常驚訝

be astonished 喫驚

be assured of 確信

be associated with 和…聯系在一起；與……有關，與……有關系

be assigned to 被分配給……，歸屬於

be assiduously engaged in writing 手不停揮

be asleep 睡著了

be asked to do 被要求（做）…

be ashamed of oneself 無以自容

be ashamed of evil deeds 羞惡

be ashamed of 爲…感到羞恥