Diboride
二硼化物
??? 情景例句
The bridge is about three hundred and eighty-five feet long.
橋長約三百八十五英尺。
Some persons do first, think afterwards, and then repent for ever.
有些人做了再思考，從而悔恨終身。
At last he said,I think I can help him. He'll be OK if I do one small operation.
“我想我能治他的病。只要我給他做一個小手術，他就會好的?！?/div>
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