Lily: Yes, it's wind instrument with keys for the fingers to press on. The body is made of brass, and is usually curved.
莉莉：这是有手指可以按动按键的管乐器的一种。而且是铜制的弯曲乐器。
There are many methods to measure the circular curved line in circuitry construction survey. Angle offset method and tangent offset method are usually used.
在线路施工测量中，圆曲线测设方法有很多，通常采用偏角法或切线支距法。
A usually black or banded, hard volcanic glass that displays shiny, curved surfaces when fractured and is formed by rapid cooling of lava.
黑曜岩火山玻璃，一般为黑色，带状，摔碎时色泽光亮，表面。
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