feng lida冯: mount bully wade理: texture; grain达: extend可合理达到的尽量低原则: as low as reasonably achievableprinciple冯莉莉: feng lili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:冯理达，即可在微信中查询翻译
