ADJ having a flattened or compressed aspect 平坦的; 平面的 [botany]
flat , even , level , plane
The hydrogen bond on the complanate triangle structure of thiourea, a kind of neutrality substance, can be the identification point to anion.
硫脲作为电中性物质，其平面三角形的极性氢键可作阴离子的识别位点。
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