It is not, however, a sign that they're getting serious about transforming the postal system for the 21st century.
但是,这并不表示他们正认真考虑为21世纪改革邮政系统。
Hugh Laurie is getting serious about the blues.
休·劳瑞要认真对待蓝调音乐了。
But if you want to work out the right moment to start getting serious, this gives you a mathematical framework.
但如果你想算出最佳结婚时间,这个公式可为你提供一个参考。
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