a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a film
a person who directs and restrains
例句
用作名词 (n.)
As in chemical reaction, the operating counseling could be a catalyzer when it is well applied, while it could be a restrainer when being misused. 若将管理辅导活动以化学反应为比喻，使用得当是催化剂，使用不当是抑制剂，虽然其并未直接参与反应，但运用之妙存乎一心，绝对可加速企业之发展。
美
[rɪst'reɪnə]
