Echelogram
阶梯光谱照片
🗣️ 情景例句
When you understand the cultural background, you can better use the language.
当你了解了文化背景，你就能更好地运用语言。
I can't recall how long it's been.
我不能记起多长时间了。
That's very nice of you.
你真是太好了。