An atom itself is a complete whole, with its electrons, protons and neutrons and other elements...一个原子本身就是一个完整的整体，包括电子、质子、中子及其他元素。The neutrons and protons form the core of the atom.中子和质子构成了原子核.A substance donates protons...
The aircraft appears to have crashed near Katmandu.飞机似乎在加德满都附近坠毁了。KATMANDU, Nepal, May 26 ? It's getting a little crowded at the top of the world.五月二十六日, 尼泊尔首都加德满都,世界之巅变得有些拥挤....Katmandu, the capital of Nepal.尼泊尔首都加...