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adj(1)活躍的，精力旺盛的(able or always ready to do things or to take action;energetic)：Although she is quite old she's still very～.她雖然已年邁，卻仍然很活躍。a very～child一個精力非常充沛的孩子;Athletes are more～than office workers.運動員比坐辦公室的人愛活動。lead an～life 過有活力的生活;He's taking an～part in school affairs.他正積極參與學校的事務。be～in a revolution/community affairs/doing sth 積極參加革命/社區(qū)服務/做某事;be～in Conservative Party 積極參與保守黨的活動;be an～supporter of women's rights 是婦女權(quán)益的積極支持者;be an～member of a club 是一個俱樂部的積極成員;soldiers on～service(BrE)/duty(AmE)在服現(xiàn)役(尤指戰(zhàn)時)的士兵;〖同〗energetic，vigorous，lively;〖反〗inactive，lazy;

(2)敏捷的，靈活的(quick;lively)：She may be eighty，but she has an～mind/brain.她可能有80歲了，但頭腦很敏捷?！纪絨uick，vigorous，alive，lively;〖反〗slow，dull;

(3)活動中的(functioning;working;in operation)：an～volcano 活火山;The volcano is no longer very～.這火山不再常爆發(fā)了。～cells in living plants and animals 成活的動植物中的活細胞;〖同〗functioning，working，acting;〖反〗inactive;

(4)能起作用的，活性的(able to cause an effect or effects;not merely passive)：Yeast is an～ingredient of bread.酵母是面包的活性成分。The chemical is still～.那化學藥品還未失效。an～element 活躍元素;～resistance 積極抵抗;

(5)主動的(having the person or thing doing the action as the subject)[無comp](gram)：the～voice 主動語態(tài);The verb here is～.這個動詞是主動語態(tài)?！挤础絧assive;

← act v;

→′actively adv 活躍地，積極地;′activeness n 活躍;ac′tivist n(政治等)積極分子;ac′tivity n 活力;活動;

n主動語態(tài)(active form of a verb)[U，the～](= active voice)(gram)：The verb in this sentence is in the～.這個句子中的動詞是主動語態(tài)。put a sentence into the～把句子變成主動語態(tài);

【辨異】active與energetic和vigorous都可表示“精力充沛(旺盛)的”。active含有“勤奮”、“迅速”的意思(與 “懶惰”、 “遲緩”相對而言)，如：an active person　(活躍的人);energetic　(精力充沛的)指熱烈有力，有時是神經(jīng)質(zhì)的活動，如：conduct an energetic campaign(組織一次熱烈的活動);vigorous(充滿活力的)指強而有效的活動，如：vigorous exercise(生機勃勃的鍛煉)。