available efficiency可用: available; usable效率: productiveness; efficiency; ...氮利用效率: nitrogen use efficiency惯用效率: conventional efficiency利用效率: utilization efficiency; utilization efficient; utilization ratio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:可用效率，即可在微信中查询翻译
