threat
n.威胁,恐吓；恶兆，兆头
Poverty is a threat to society.
贫困对社会是一种威胁。
Global warming is posing a threat to human survival.
全球升温对人类的生存正构成威胁。
The dark clouds are a threat of a heavy rain.
这些乌云是大雨将至的前兆。
threaten
vt.威胁…；有……的前兆
Todd threatened his wife with divorce.
陶德以离婚威胁他老婆。
These clouds threaten rain.
这些云是下雨的前兆。
conversation
n.(两人以上的）对话
You can strike up a conversation with people by talking about the weather.
你可以从谈论天气与人打开话题。
dialogue
n.(两人的）对话
Simply reading the dialogue is not enough. You should act it out.
你可以从谈论天气与人打开话题。
typical
a.典型的；特有的
It was a typical summer morning.
那是个典型的夏日早晨。
This weather is typical of the Mediterranean climate.
这种天气是典型的地中海型气候。
chain
n.链子；连锁店 vt.用铁链锁住
Bill wears a gold chain around his neck.
比尔的脖子上挂了条金链子。
The ice cream parlor around the corner is part of a 10-location chain in this city.
转角附近的那家冰淇淋店是本市某个有10家店面的连锁店其中的一家。
Jim is a chain smoker. He smokes one cigarette right after another.
吉姆是个瘾君子。他烟一根接着一根抽。
The dog is chained to the tree.
狗被用链子拴在那棵树。
heaven
n.天堂（不与 the 并用)
Good people will go to heaven after they die.
好人死后会到天堂去。
Heaven's vengeance is slow but sure.
天网恢恢，疏而不漏。——谚语
paradise
n.天堂（=heaven)；乐园
They say Singapore is a shopping paradise.
据说新加坡是个购物天堂。
hell
n.地狱（不与the并用）
Bad people go to hell after they die.
坏人死后会下地狱。