Spectrograde
光谱级(的), 光谱纯(的)
🗣️ 情景例句
We usually ship the goods by regular liners.
我们一般是定期班轮装运货物。
Do you ever study English on Sunday?
你曾经在星期日学英文吗？
He repaired his house.
他修理了他的房子。