一个小时后，房间里响起了另一首歌，响亮而刺耳。
An hour later another song, loud and screechy, filled the room.
伯南克昨天在其国会证词中给金融市场发出了一个明确而响亮的信息：美联储正“准备”而且“有能力”应对美国经济。
In his Congressional testimony yesterday, Mr. Bernanke had a clear and loud message to financial markets: the Fed is "prepared" and have the "means" to take action on the economy.
系统不能探测到静止的物品, 而当信号暂时被一个移动的物品(比如一个人)阻挡, 强度变量会响亮而清晰.
The need for variation means the system cannot see things that are stationary. When the signal is temporarily blocked by a moving object such as a person, however, it shows up loud and clear.
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