1、Describes guidelines for designing unsealed classes.
描述未密封類的設計準則。

2、This is an unsealed letter, don’t read it.
這是一封未密封的信, 不要看。

3、How shall my heart be unsealed unless it be broken?
除非我的心裂為碎片，否則又怎能將它開啟呢？

4、An unsealed class allows other classes to inherit from it.
其他類可以從未密封類繼承。

5、Back in the days when energy was cheap, home builders didn't worry much about unsealed cracks.
在能源價格低廉的年代，房屋建筑商并不太擔心未密封的裂縫。

6、Three were unsealed CARDS from old friends.
三封沒有封口，是老朋友寄來的生日卡。