adj (1)有关自然的;天然产生的;非人工的(of or produced by nature，not made by men)[作attrib]：～phenomena/resources/disasters/environment/materials/gas自然现象/自然资源/自然灾害/自然环境/天然材料/天然气;～childbirth/history/law/philosophy/selection自然分娩法/博物学/自然规律/自然哲学/自然选择;Wild animals are happier in their～state than in a zoo. 野生动物生活在自然界要比在动物园中更快活。The moon is a～satellite of the earth. 月球是地球的天然卫星。

(2)本(天)性的;生而具之的(produced at birth or belonging to the nature one has)[作attrib]：～beauty/grace/ability/charm/gift天性的美/天赋的丽质/天赋/天生的魅力/天赋的才能; It is～for ducks to swim. 鸭子天生会游水。He is a～actor. 他是天生的演员。Kindness is～to him. 他天性善良。It takes～talent and lots of hard work. 这需要天才和勤奋。〖同〗instinctive，inborn，inherent，native;〖反〗unnatural，artificial;

(3)正常的;预料之中的(due to the operation of the ordinary course of nature)：a～death/outcome/reaction/explanation 正常死亡/必然结果/正常反应/合乎情理的解释;It would be hardly～for him to do that. 他做那种事是不大正常的。It's～to be happy on your wedding day.你结婚那天当然十分高兴。It's quite～for a boy of his age to be interested in girls. 他这个年龄的男孩子对女孩子感兴趣是很自然的。

(4)不做作的;自然的(free from self-consciousness;at ease)：a～voice/smile/manner/style/gesture 自然的嗓音/微笑/仪态/风格/姿态;Try to be～before the microphone. 在话筒前要尽量保持自然。Successful people are genuine and～rather than synthetic and imitative. 有成就的人都是真诚和自然的，而绝不是虚伪和矫揉造作的。 She made no pretence and was perfectly～. 她一点都不装腔作势，自然极了。〖同〗 unaffected，genuine，plain;〖反〗affected，assumed;

(5)(音乐)本位音的(not sharp or flat)：G～G本位音;the～scale of D major D大调;G～is lower in pitch than G sharp. G的本位音比升G低。

(6)生身的(别于领养的)(related by actual birth(not adoption，etc))：one's～parents 其生身父母;

(7)私生的(illegitimate)：her～son 她的私生子;

→′naturally adv. 自然地;天生地;

n (1)本位音，还原符号((in music) (a sign indicating) a note which is not to be played sharp or flat)：There are three～s in that chord. 在那个和弦里有三个本位音。

(2)理想的人选(a person who is naturally good at something)[N(for)]：She would be a～for Lady Macbeth. 她是扮演麦克佩斯夫人的理想人选。Look at her run;she's a～. 看她跑的那样子，真是天生的。He is a short story～. 他是写短篇小说的天才。

→′naturalness n 自然的状态或性质