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It could be hydrogen bonding. Could be different.
它有可能是氢键，可能不同。
youdao
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Because there's weak hydrogen bonding between the unlike species.
因为在不同种分子间，存在较弱的氢键。
youdao
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Because there's weak hydrogen bonding between the unlike species.
因为在不同种分子间，存在较弱的氢键。
youdao