Operant
n. 发生作用之人或物, 工作之人或物\\na. 动作的
🗣️ 情景例句
Let's buy some potted plants for the dining room.
我们需要买一些盆栽装饰饭厅。
Novelty is the great parent of pleasure.
新奇生乐趣。
Opportunity knocks but once.
机不可失，时不再来。