The kit includes a new set of two types of crystals — one for sweet and one for other food — each month.

此产品中包括两种颗粒，一种用在甜食上，一种用于其他食品，每月一套。

youdao

"little guide to different types of snowflakes sectored plates and capped columns and hollow columns and all different types of crystals.

VOA: standard.2009.12.19

While there are only a handful of types of crystals that can be used for lasers, materials scientists can bake any manner of ceramic that can produce lasers of different wavelengths, power and efficiency.

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