Pre-testing
n. （广告业中的）预先测试
🧩 词语组成解析
abbr. 炼油工程师（Petroleum Refining Engineer）
testing
[['testiŋ]]
n. 测试\\na. 吃力的, 试验的
🗣️ 情景例句
It's five years ago.
那是五年前了。
Two dollars and seventy-five cents.
二美元七角五分。
During the night, it got terribly cold.
夜里，天冷得厉害。