Uvb
[医][=ultraviolet light,midrange sunbeam spectrum]紫外线B光谱, 中波紫外线光谱
🗣️ 情景例句
It's such an important decision.
这是一个如此重要的决定。
What are you playing?
你正在玩什么？
Between twelve and eighty years we gradually lose this power;
除在12岁至80岁之间，我们逐渐丧失这种能力。