I was not quite four when he passed away. But I still remember moments with him. Falling down a curly slide into his arms.
父亲去世时我才不到四岁,但我依然还记得与他在一起的时光:东倒西歪地向前挪着步子倒在他的臂弯里;
The noise was quite disruptive at first, but after about four minutes the subjects were doing just as well on their tasks as control subjects who were not exposed to noise.
起初,受试者会被噪音扰乱,但大约四分钟后,他们在任务中的表现与未受噪音影响的对照组受试者一样好。
This has been quite an achievement—not least because it was completed in just four years.
这是相当大的成就——不仅因为只在4年里就完成了票证电子化。
I think around four or five, I'm not quite sure.
我想在四五岁左右,我不是很确定。
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