utility class工具: tool; means; implement; appl ...工具类产品: tools &supplies坏工具类: machines & tools机械工具类: machines & tools设定交通工具类: setting the vehicle type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:工具类,即可在微信中查询翻译