沉着的英文：
calm and collected
not nervous

参考例句：

Self - confident assurance;poise.
自信，沉着;泰然自若

She was self-assured, poised, almost self-satisfied.
她自信、沉着，几乎有些自满了。

Unusual red pigmentation,as of hair or plumage.
异常的红色素沉着异常的红色素沉着，像红须发或红羽毛

She had the strength and sangfroid of a woman in the prime of life.
她具有正值青春的少妇的力量和沉着。

All the restless devils inside her were quietened by this silence and by the calm strength of this companion
这同伴的沉着镇静，把她心中的烦躁不安驱散得一干二净。

Having or suggesting a calm,sluggish temperament;unemotional.
迟钝的，冷淡的有或暗含沉着、迟缓性情的;不动感情的

Dark coloration of the skin,hair,fur,or feathers because of a high concentration of melanin.
黑色素沉着病头发、皮肤、毛皮或羽毛因黑色素沉积而变黑

The mind, which renounces, once and forever, a futile hope, has its compensation in ever-growing calm. —— George Gissing
敢于永远抛弃不实际希望的心灵，将不断在沉着方面得到补偿。——吉森

A sedate person out of livery approached them and relieved the maid of her bags.
一个举止沉着镇静、没穿制服的人走来，从女仆手里接过提包。

Abnormally dark pigmentation of the skin or other tissues,resulting from a disorder of pigment metabolism.
黑变病，黑素沉着病因色素代谢失常而引起的皮肤或其他组织中黑色素沉积着的状况。

calm是什么意思：
adj. （水面）平静的，（天气）无风的；镇定的，沉着的，宁静的
n. 平静；无风；镇定；安静
v. 使平静；使镇定；安静下来

The tempest calmed.
暴风雨停息了。

You must keep calm in an emergency.
在紧急关头要保持镇静。

calm zone of Cancer
北半球副热带无风带

collected是什么意思：
adj. 镇定的；收集成的
v. collect的过去式和过去分词

Fashion collection
时装展销

shell collecting
贝壳采集

Compile the collection
编译此收集

nervous是什么意思：
adj. 神经的；紧张不安的；神经过敏的

Anatomically, the nervous system is divided into the central nervous system and the peripheral nervous system.
解剖学上把神经组织分为中枢神经系统和周围神经系统。

Her nervous tension relaxed.
她紧张的神经松弛下来。

The brain is the centre of the nervous system.
脑是神经系统的中枢。