Spectrograde
光谱级(的), 光谱纯(的)
🗣️ 情景例句
How much do stamps cost?
邮票多少钱？
Which one is more difficult?
哪一个是比较难的？
What's that? asked Lucy. She pointed at a strange thing with three legs and a strange top. It was made of metal.
“那是什么？”露西说。露西指着一个有三条腿和一个奇怪的顶部的怪怪的东西问。是用金属造的。