airtight [5eEtaIt] adj. 密閉的，不透氣的(impermeable to air or nearly so)
(類)foolproof·fail=airtight·leak 極其可靠的不會出故障=密封的不會泄漏
【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
(記)ala—上海方言;聯(lián)想：上海人的皮膚白→雪白的
airy [ 5ZEri ] adj. 通風(fēng)的(open to the air);輕快的(light-hearted; gay);空洞的，不切實際的
alacrity [E5lAkrItI] n. 敏捷，輕快;渴望，樂意(promptness in response：cheerful readiness)
(類)alacrity·prompt=acumen·shrewd 敏捷·快速=敏銳·干練(同義)
alacrity·apathetic=temerity·timid 渴望·缺乏感情的=鹵莽蠻勇的·膽怯的(名形反義)
husbandry·dissipate=alacrity·procrastinate 節(jié)約·浪費=敏捷·延遲(反義)
(反)alacrity ◆ hesitance and reluctance 樂意(敏捷，欣然) ◆ 猶豫和不情愿
(反)dilatoriness 遲緩，拖延 hesitance 猶豫，躊躇
(例)He accepted the invitation with alacrity 他欣然接受了邀請。
albeit [C:l5bi:It] conj. 盡管，雖然(表示讓步和轉(zhuǎn)折)
(例)clear albeit cold weather. 雖然天冷但仍很晴朗
albino [Al5bi:nEJ] n. 白化病 (an organism exhibiting deficient pigmentation)
(類)albino·pigment=prairie·tree 白化病缺乏色素=大草原缺乏樹
alchemy [5AlkEmI] n. 煉金術(shù)(medieval chemistry)
(類)alchemy·chemistry=false drug·treatment 煉金術(shù)·化學(xué)=假藥·治療(種屬，特征"假")
alcove [ 5AlkEuv ] n.凹室, 壁櫥(niche，recess)
alert [ E5lE:t ] adj.提防的, 警覺的(vigilantly attentive)n. 警報
alias [ 5eiliAs ] n.別名, 化名(an assumed name)