Gub
abbr. generalized upper boundary 模糊上限
✅ 同义词
🗣️ 情景例句
You haven't changed much in fifty years.
你五十年来没有什么变。
She was fully equipped for the climbing.
她装备齐全，准备登山。
where chance discoveries play a much larger part than they do in physical and mechancal industries.
同物理和机械工业相比，化学工业中偶然发现的机会要多得多。