You can avoid the single supplement by agreeing to share a twin room.

你如果同意与人共住双人房就可免交单间附加费。

《柯林斯英汉双解大词典》

This suggests that both stronger profits and a higher market share are the twin rewards for better performance.

也就说，出色的业绩能带来利润和市场占有率双重回报。

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Patients who receive a bone marrow transplant from an identical twin relapse half the time, perhaps because the twins share nearly identical immune systems.

FORBES: Magazine Article