名 sky，heaven，day，a period of time in a day；形 overhead，natural，innate ；

[例句] 人生就应该是快乐的，要抓住每一天，孩子们，让你们的生活变得非凡起来。 Carpe diem. Seize the day, boys. Make your lives extraordinary.

[例句] 终有一天，你会学会让泪往心里流。 Eventually, you'll learn to cry that on the inside.

weather；

[例句] 如果天气适宜，会有更多的人被吸引到骑自行车的行列中来。 More people would be attracted to cycling if conditions were right.

[例句] 坏天气对上午那些风笛吹奏者毫不容情。 The weather was unkind to those pipers who played in the morning.

名 sky，heaven；

[例句] 清晨，天空呈现出斑驳的深灰色。 In the mornings the sky appeared a heavy shade of mottled gray.

[例句] 那天一反常态，天空阳光明媚。 For a change, it was a gloriously sunny day.

antenna，aerial，antenna wire，air wire，antennae；

[例句] 调整天线的位置和方向以达到最佳接收效果。 Adjust the aerial's position and direction for the best reception.

[例句] 编码信号由碟形卫星天线接收。 The coded signal is received by satellite dish aerials.

celestial body，heavenly body，world，aster，celestial bodies；

[例句] 人类在接近各个星球，探索新的天体。 Man was drawing closer to the stars, opening new worlds.

[例句] 这份天体图标明了北半部所有的星座. The map of the heavens showed all the northern constellations.

natural，native，living，savageness ；

[例句] 这个球是由一种天然纤维——省藤制成的。 The ball is made of rattan — a natural fibre.

[例句] 巨型天然港普尔港是船只的避风港。 The gigantic natural harbour of Poole is a haven for boats.

in the open，open-air，outdoors，the open air ；

[例句] 露天游乐场的飞车就是想把人吓丢了魂儿。 Fairground rides are intended to frighten the life out of you.

[例句] 露天花园容易被冷风吹透。 An exposed garden may be chilled by cold winds.

space flight，spaceflight，aerospace ；

[例句] 阿里安航天火箭项目取得了辉煌的成功。 The Ariane space-rocket project has had a shining success.

[例句] 不久之后，国防开支的削减迫使航空航天业紧缩开支。 Shortly afterwards, cuts in defence spending forced the aerospace industry to retrench.

swan，cygnus ；

[例句] 我把天鹅绒布弄皱了。 I wrinkled the velvet.

[例句] 一群天鹅缓缓游过。 A group of swans floated by.

astronomy，chronometer ；

[例句] 这四枚新邮票是为了纪念英国天文协会成立100周年而发行的。 The four new stamps mark the 100th anniversary of the British Astronomical Association.

[例句] 在历史的年代数目和天文年代数目之间存在差别. There are differences between historical and astronomical numbering of years.

transit，midheaven，passage，meridian passage，[电影]The Restless；

[例句] 北京芙德中天集团位于北京市海淀区中关村创业园区. Beijing Zhongtian Group FuDe located in Zhongguancun, Haidian District, Beijing Venture Park.

[例句] 在三羧酸循环中天冬氨酸可以被分解. Aspartic acid can be broken down in the KREBS CYCLE.

balance，auncel，scales，scale ；

[例句] 在你和我中间, 那天平是十分平衡的. Between thee and me, the scale hangs fairly balanced.

[例句] 通过调整气体的压力可以使天平横梁平衡. The gas pressure is adjusted so as to balance the beam.

inborn，innate，natural gift，talent，dower；

[例句] 即使是最有天赋的人也可能会被错误的导师摧毁自信。 Even the most gifted can have confidence destroyed by the wrong instructor.

[例句] 她为自己的两个孩子都有音乐天赋而自豪。 She is proud that both her children have a talent for music.

genius，talent，man of genius，gift，giant ；

[例句] 大多数孩子既不是天才也不是明星，他们只是表现平平。 Most children are not geniuses or stars. They just do averagely well.

[例句] 天才通常都被认为行为古怪而且毫无实践能力。 Geniuses are supposed to be eccentric and hopelessly impractical.

angel，an emissary from the emperor，[电影]L'ange；

[例句] 小女孩们在节日里扮成天使的样子。 Little girls dress up as angels for fiestas.

[例句] 对守护天使的蹩脚设计弄巧成拙，从一开始就注定这部电影要失败。 The ill-advised conceit of the guardian angel dooms the film from the start.

[植] asparagus fern，asparagus cochinchinensis ；

[例句] RGD是 由精氨酸 ( Arg ) 、 甘氨酸 ( Gly ) 、天冬氨酸 ( Asp ) 三个氨基酸组成的序列肽, 是近几年来发现的具有生物活性的短肽序列之一. RGD is composed of three amino acids, arginine ( Arg ), glycine ( Gly ) and aspartic acid ( Asp ).

[例句] 采用两步交联法合成了可生物降解聚天冬氨酸水凝胶. Biodegradable poly ( L - aspartic acid ) hydrogels were synthesized by a two step cross - linking reaction.

small yard，courtyard，skylight，[采矿] raiserockhole，dooryard ；

[例句] 这天井是用石板铺砌而成的. The patio was made of stone slabs.

[例句] 他们走出祖父的房门,穿过堂屋, 走下了天井. After crossing the great hall, they entered the courtyard.

antenna housing，radome，bister ；

[例句] 天线罩使跟踪天线的极图产生了角位移. The radome causes an angular displacement of the tracking aerial polar diagram.

[例句] 雷达天线罩以铰链方式安装以便于检修雷达. The radome was hinged to permit easier access to the radar.

atmospherics，strays，sferics，atmospheric electricity ；

[例句] 天电干扰太大,听不清他们的电讯. There was too much static to hear their message clearly.

daytime，day ；

[例句] 她在梦中焦虑不安，反映了她白天生活的基调。 Her dreams were troubled, reflecting the tenor of her waking hours.

[例句] 至少白天我还有别的事情要做。 I had other matters to occupy me, during the day at least.