airtight [5eEtaIt] adj. 密闭的，不透气的(impermeable to air or nearly so)
(类)foolproof·fail=airtight·leak 极其可靠的不会出故障=密封的不会泄漏
【注】foolproof ：adj. so simple or reliable as to leave no opportunity for error or failure
alabaster [ 5AlEbB:stE ] n.雪花石膏 adj.雪白的
(记)ala—上海方言;联想：上海人的皮肤白→雪白的
airy [ 5ZEri ] adj. 通风的(open to the air);轻快的(light-hearted; gay);空洞的，不切实际的
alacrity [E5lAkrItI] n. 敏捷，轻快;渴望，乐意(promptness in response：cheerful readiness)
(类)alacrity·prompt=acumen·shrewd 敏捷·快速=敏锐·干练(同义)
alacrity·apathetic=temerity·timid 渴望·缺乏感情的=卤莽蛮勇的·胆怯的(名形反义)
husbandry·dissipate=alacrity·procrastinate 节约·浪费=敏捷·延迟(反义)
(反)alacrity ◆ hesitance and reluctance 乐意(敏捷，欣然) ◆ 犹豫和不情愿
(反)dilatoriness 迟缓，拖延 hesitance 犹豫，踌躇
(例)He accepted the invitation with alacrity 他欣然接受了邀请。
albeit [C:l5bi:It] conj. 尽管，虽然(表示让步和转折)
(例)clear albeit cold weather. 虽然天冷但仍很晴朗
albino [Al5bi:nEJ] n. 白化病 (an organism exhibiting deficient pigmentation)
(类)albino·pigment=prairie·tree 白化病缺乏色素=大草原缺乏树
alchemy [5AlkEmI] n. 炼金术(medieval chemistry)
(类)alchemy·chemistry=false drug·treatment 炼金术·化学=假药·治疗(种属，特征"假")
alcove [ 5AlkEuv ] n.凹室, 壁橱(niche，recess)
alert [ E5lE:t ] adj.提防的, 警觉的(vigilantly attentive)n. 警报
alias [ 5eiliAs ] n.别名, 化名(an assumed name)
