crystal form的用法和樣例：
例句
- Complete ubic octahedral crystal shape,high strength and thermal stability.
具有完整的立方八面體晶形，高強度和熱穩定性。 - The crystal form of the product gained by conventional heating is smooth, while it is lumpish for the product gained by microwave heating.
常規加熱法合成樣品的晶形較為圓滑，而微波合成樣品為塊狀。
