He closed his speech with the hope that the nation would come out of the war with greater unity than ever before.

VOA: special.2009.11.12

The number of moles stays the same a closed systems, gas doesn't come out.

摩尔数保持不变,因为是闭系，气体不会跑出去。

麻省理工公开课 - 热力学与动力学课程节选

"Johnsy,dear," said Sue, "will you promise me to keep your eyes closed, and not look out the window until I am done working?

VOA: special.2009.08.01

His eyes were closed. The news went out by telegraph to cities and towns across the country.

VOA: special.2009.12.31

The process uses a closed system to keep hair and dirt out of the milk.

VOA: special.2010.07.20

Factories were closed. Hundreds of thousands of people were out of work.

VOA: special.2009.10.08

Sasha Vujacic closed the game out for the Lakers.

VOA: special.2010.06.25

And every night, late at night, I turned the lock of his door and opened it C oh,so gently! And then, when I had made an opening big enough for my head, I put in a dark lantern, all closed that no light shone out, and then I stuck in my head.

VOA: special.2009.05.16