Powellites
(powellite 的复数) 钼钨钙矿
🗣️ 情景例句
Alexandra called.
Alexandra来电话了。
He that would command must serve.
欲做先生，先做学生。
She heard the front door open and heavy footsteps in the hall.
她听见前门被打开，走廊里响起重重的脚步声。