常年的英文：
perennial
year in year out
average year

参考例句：

He persists in physical training all the year round.
他常年坚持体育锻炼。

This wine cellar stays at an even temperature all year round.
这个酒窖常年保持恒温.

In general ,Scotland is colder throughout the year ,and receives more rain.
一般而言,苏格兰常年寒冷多雨。

He's bedridden throughout the year with a lingering, obstinate disease.
他身患痼疾，常年缠绵病榻。

The top four were all in Japan, including Tokyo as the perennial No.1.
前四名都在日本，其中东京常年位居榜首。

At Yale, intramural sports from soccer to water polo take place all year long
在耶鲁，校内体育运动从足球到水球常年都有

His flesh was as firm and clean as wood, stained richly tan with the climate’s rigor
他的肌肉像木头一样结实干净，常年的风吹日晒，使他的皮肤变成了深褐色。

Derek has allergies to common antibiotics, and Jeffrey is weakened from years of treatment for Hodgkin's disease
德里克对一般抗生素有过敏反应,而杰佛里则由于常年治疗淋巴恶性肉芽肿病而变得很虚弱。

I use a large quantity of serge during the year,and can give you considerable order if your quality is suitable.
本公司常年使用大量哔叽布，如贵公司提供的产品质量合乎要求，我司可大量订购。

perennial是什么意思：
adj. 多年生的；常年的，反复的
n. 多年生植物

It's a low-growing perennial.
它是多年生矮小植物。

A perennial plant, such as the English daisy, cultivated as a biennial.
以两年生植物栽种的多年生植物，如英国雏菊

The fine carnation of their cheeks is perennial as sunlight in the seventh heavens
她们面颊的美丽的淡红色象七重天里的阳光始终辉煌灿烂。

year是什么意思：
n. 年；年份，年度，一年，年级；班级，岁；年代，多年；很久

Year succeeds to year.
年复一年。

This year is a banner year for crops.
今年是个丰年。

Year after year went past.
一年又一年过去了。

out是什么意思：
adv. 出外；在外；离岸；出现；问世；大声地；完全；用完；不流行
adj. 外侧的；偏僻的
prep. 通过…而出；沿着…而去
n. 借口，托辞
pref. 外，超过，出，向外

be out for the count
拳击者被击倒后经裁判数到十秒还站不起来|被判失败|打输|被打败

Out of the Blue
从天上掉下来

Out of power, he is out of favour.
当他失去权力之后，他也就不再受人欢迎。