人造假花由多种物质构成，如蜡和玻璃，由于技术太高以至于很难从自然的花朵中区分开来。
Artificial flowers are made from a variety of materials, such as wax and glass, so skillfully that they can scarcely be distinguished from natural flowers.
棕榈蜡替代石蜡作为人造板防水剂，可以起到很好的防水作用。
Palm wax used as a substitute of Paraffin wax as waterproofing agent in wood-based...
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