尽量保持平静。用英语怎么说？

尽量保持平静。

Try to keep your composure.

try

vt.& vi. 试图，努力，实验，审判，考

例句
He stopped to try to adjust his vision to the faint starlight...
他停下脚步试着让眼睛适应微弱的星光。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

keep

vt. 保持，保留，遵守，阻止；vi. （食品）保持新，保持健康；n. 保持，保养，供养，抚养，生活，生计，饲料；牧草；

例句
The company say they're able to keep pricing competitive...
该公司说他们能够使定价保持竞争力。

your

pron. 你的，你们的，尊，玉，乃；

例句
I think there's something a little peculiar about the results of your test.
我认为你的化验结果有点不对劲。

composure

n. 镇静，沉着，头脑镇定或沉着的状态；

例句
Nothing could ruffle the perfect composure with which she casually greets members of staff.
什么都不能扰乱她随意地和员工打招呼时流露出的那种镇定自若。