Noviro
双键
Simplified 双键
Traditional 雙鍵
Pinyin shuāng jiàn
Definition double bond (chemistry)
这个分子有双键
Zhè ge fēnzǐ yǒu shuāng jiàn
This molecule has a double bond
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key (on a piano or computer keyboard); button (on a mouse or other device); chemical bond; linchpin
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