chalk rating粉: powder化: change; turn; transform级别: rank; level; grade; scale; s ...串行化级别: serializable isolation耐粉化级钛白粉: chalk resistance grade titanium dioxide下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:粉化级别,即可在微信中查询翻译