n.零价镍催化剂 zero-valent: 零价的nickel catalyst: 镍触媒;镍催化剂; 镍催化剂raney nickel catalyst: 兰尼镍催化剂unsupported nickel catalyst: 无载体镍催化剂valent: comb. f. 【化学】原子[化合]价的,…价的〔常作复合词用〕:monovalent. 下载手机词典可随时随地查词查翻译