The first part of the problem is easy because we know that the next square is going to be twice as large as our old square.
问题的第一部分是容易的，因为我们知道下一个广场将是两倍大，我们的老广场。
It is not easy for a woman to succeed in her work. It is even more difficult for a woman to win the Nobel Prize twice in life. So Madame Curie will always be remembered as a great woman.
一个女人事业成功不容易，而一生中两次获得诺贝尔奖更为困难，居里夫人作为一名伟大的女性永远为人民怀念。
Rotate the emergency closing valve positive and negative continuously twice so as to solve the safety problem, it is easy to operate, faster and non-slam.
采用该应 急阀，只须连续正反两次转动即可解决安全问题，操作简单、 快捷、无撞击。
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