1·The main material of most masks is polypropylene.
大多数口罩的主要材料是聚丙烯。
2·What is the main material of this synthetic shirt?
这件混合纤维衬衣的主要材料是什么？
3·Wood waste is the main material of producing wood chips.
采伐剩余物是生产工业木片的主要原料。
4·The main material of the phosphate fertilizer is apatite.
这种磷肥的主要原料就是磷灰石。
5·Electricity is the main material for chlorate production.
电是生产氯酸盐的主要原料。
6·Main material of door: Solid wood, HDF board, Quality Steel Plate.
主要材质门：实木，高密度纤维板板，优质钢板。
7·The main material used is polyurethane elastomer and chloroprene rubber.
带子的主体材料有聚氨酯弹性体和氯丁橡胶两种。
8·The selected main material to reveal the concept of 'the rock' was brick.
为了表现“岩石”的概念，主要材料选定为砖。
9·8 honey royal jelly royal jelly contained in aspartate is "help" the main material.
蜂蜜，蜂王浆，蜂王浆中所载的天门冬氨酸起“帮助”作用的主要原料。
10·Pear vinegar is a kind of fruits vinegar made of pear as the main material by crushing.
梨醋是以梨为主要原料，经破碎、榨汁、酒精发酵、醋酸发酵而成的一种果醋。