这是个老大难问题。
The dandelion is a perennial plant.
该蒲公英是一种多年生的植物。
Urtica is a kind of perennial plant.
荨麻是一种多年生草本植物。
And that's a perennial issue in philosophy.
这在哲学上也是一个经久不衰的问题。
Prepare perennial essential preparative work.
常年必要的计量准备工作。
Yeah, it seems that it is a perennial question.
看来这是个永恒的问题了。
Glass says infectious disease is a perennial concern.
格拉斯说，预防传染病应该是一种常年的关注。
Our perennial problem is not having enough money.
长期困扰我们的问题就是缺钱。
Another perennial safe bet, but are they worth it?
这是另一个存在了多年的安全赌注，但是划算吗？
The common buttercup is a popular perennial plant.
这种常见的金凤花是一种很受欢迎的多年生植物。
There is a perennial shortage of water in this area.
这地区长期缺水。
Tom: Yeah, it seems that it is a perennial question.
看来这是个永恒的问题了。
It is the perennial problem with beautiful bouquets.
让鲜花保持盛开似乎是一个永远待解决的问题。
It is the world's climate coldest place, a perennial ice.
它是世界上气候最冷的地方，常年冰雪覆盖。
Cue the perennial question: why doesn't this wine travel?
这提醒了我们一个经久不衰的问题：葡萄酒为何不能旅行呢？
Harmony and reunion are the two perennial themes of the gala.
和谐、团聚是晚会的两大主题。
Those who pursuit perennial happiness win nothing in the end.
那些追求永久幸福的人往往最后什么都得不到。
Television's influence on young viewers is a perennial hot topic.
长期以来，电视对青少年的影响一直是个热门话题。
Despite some high notes, this power ballad is a perennial favorite.
尽管有些高音，这首充满力量的民歌是经久不衰的金曲。
I assume that's because France is such a perennial economic powerhouse.
我想这是因为法国长期以来的经济强国地位。
The novel's central theme is the perennial conflict between men and women.
小说的主题是男人和女人之间永无休止的冲突。
It reflects a perennial worry in the Arab world about the state of the language.
它反映了长久以来对阿拉伯语世界内关于该语言现状的担忧。
Can we buy happiness? This perennial question is back at the top of the agenda.
我们能买到幸福吗？这一永恒的问题正再度回到首要议程上来。
Objective To explore the treatment of perennial allergic rhinitis with microwave.
目的探讨微波治疗常年变应性鼻炎。
Objective: To investigate the effect of operation on perennial allergic rhinitis.
前言：目的：探讨鼻腔综合手术治疗常年性变应性鼻炎的效果。
So a perennial is the opposite of an annual. Perennials come back year after year.
所以perennial就是annual的反义词，perennial是每年都有的。
So a perennial is the opposite of an annual. Perennials come back year after year.
所以perennial就是annual的反义词，perennial是每年都有的。
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