仔细观察本土人士讲英语时的嘴型和舌位。

Watch the mouths and tongues of native English speakers carefully.

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我每天早晨醒来时口干舌燥，感觉我身体里的五脏六腑错了位，身体异常沉重。

I woke up every morning with a dry mouth and the sensation that my insides were in the wrong place and too heavy for my body.

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然而，自20世纪80年代中期始，这些家庭的年收入稳步上升，据Thomas Piketty和Emmanuel Saez这两位经济学家的计算，2007年1%最富裕家庭年收入总和的比重高得令人咂舌，达18.3%。

Yet after rising steadily since the mid-1980s, reckon Thomas Piketty and Emmanuel Saez, two economists, in 2007 the income share of the richest percentile reached a staggering 18.3%.

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