Elkonite
埃尔科奈特钨铜烧结合金
🗣️ 情景例句
What's the matter?
到底发生了什么事？
Please call me and let me know.
请打电话告诉我。
Because of this, we kept looking back, wondering if we were leaving a trail of oil and petrol behind us.
因此，我们不时地掉过头，怀疑车后是否留下了机油和汽油的痕迹。