He misread the date on the letter; it was October 15th, not 16th.
他看错了信上的日期,那是十月十五日,不是十六日。
By the 16th century, a pendulum clock had been devised, but the pendulum swung in a large arc and thus was not very efficient.
到了16世纪,人们发明了摆钟,但钟摆摆动的幅度很大,因此效率不高。
The 29th Olympic Games and the 16th Paralympic Games held not long ago in Beijing were a huge success.
不久前,在北京举办的第29届夏季奥运会和第16届残奥会取得了巨大成功。
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