1. fluid /ˈflu:ɪd/

-- 1. substance that flows  2. not rigid; changing easily

Air, water, molasses and milk are all fluids.

空气、水、糖蜜和牛奶都是流体。

During November, the military situation remained fluid, with advances and retrests by both sides.

11月份的时候，战况不大稳定，双方皆有前进和撤退。

 

 

2. flux /flʌks/

-- continuous flow or changing; unceasing change

When prices are in a state of flux, many buyers delay purchases until conditions are more settled. 

物价波动时，许多购买者延迟采购，直到状况稳定一点时为止。

 

 

3. influx /ˈɪnˌflʌks/

-- inflow; impouring

The discovery of gold in California in 1848 caused a larged influx of settlers from the East.

加利福尼亚州在1848年发现黄金以后，引来大批东部移民的涌入。

 

 

4. fluctuate /ˈflʌktjueit/

-- flow like a wave; move up and down; change often and irregularly; be unsteady

Recently the price of a pound of tomatoes has fluctuated from a high of 45 cents to a low of 29 cents.

近来一磅的番茄的价格在最高价45美分与最低价29美分之间波动。

 

 

5. fluent /ˈflu:ənt/

-- ready with a flow of words; speaking or writing easily

Do you have to grope for words or are you a fluent speaker?

你不得不搜肠刮肚地找话说，抑或你是一位流利的演说家？