A five-year-old child may easily find and use apps on a smart phone.
一个五岁的孩子可以轻易地找到和使用智能手机上的应用程序。
A red light is a signal of danger, which is even known to a five-year-old child.
红灯是危险的信号，这一点就连五岁的孩子都知道。
But not even the most advanced robot can recognise and move the pieces on a real chessboard as adeptly as a five-year-old child.
但是，即使是现在最先进的机器人，也还不能像五岁大的孩子一样熟练地识别或移动现实生活中棋盘上的棋子。
Case in point, she argues: a three-year-old in China may know how to count to 20, while that may not happen for an American child until the age of five.
她举例说，在中国，一个三岁的孩子就能从1数到20，而美国孩子一般到了五岁才能数到20。
At 60 kilograms, three-year-old Lu Hao is already five times the size of a normal child his age.
如今他3岁，120斤，体重是其他同龄孩子的5倍......
I recently at a friend's house, their five year old child ready to go to bed.
我最近在朋友家，他们五岁的小孩准备上床睡觉。
I recently at a friend's house, their five year old child ready to go to bed.
我最近在朋友家，他们五岁的小孩准备上床睡觉。
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