Serpex
塞佩克斯碱性耐火材料
🗣️ 情景例句
There's always a friend around when you need one.
当你需要朋友帮忙的时候，总会有朋友在你身边的。
It's too dark.
太黑暗了。
He sent the journalist two more faxes, but received no reply.
他给记者先后发去两份传真，但对方毫无反应。