Precarburization
预先碳化[渗碳]
🗣️ 情景例句
Well, you all know I'm working on my photo album.
好吧，你们都知道我正在进行我的写真集。
Nothing is impossible to a willing mind.
世上无难事，只怕有心人。
however painful it may be at the moment.
尽管会有暂时的痛苦。