Sierras
n. 齿状山脊, 马鲛( sierra的复数形式 )
🗣️ 情景例句
Let's use the fine china.
我们用上好的瓷器吧。
When is the most convenient time for us to meet?
我们什么时候见面最方便呢？
he identifies himself with its centre of gravity, its mass, its weight;
他把自身和物体重心、质量、重量融为一体。