external crack外表: outward appearance; exterior ...裂缝: rent; rip; hiatus; tear; rif ...外表裂纹: external crack外表面裂缝: external crack表裂: superficial cleavage; surface check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:外表裂缝,即可在微信中查询翻译