teeters
n.
踉跄( teeter的名词复数 );
摇摆;
跷跷板;
斑鹬;
v.
摇晃地站立或移动( teeter的第三人称单数 );
玩跷跷板;
处在（灾难或危险的）边缘;
濒临;
例句:
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The pair teeters on the fine cusp between mainstream post-bebop and spiky free improvisation.
来自BBC
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He found that this spot teeters right on the edge of chaotic behavior.
他发现,这个位置就摇晃着立在混乱行为的边缘.
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The more the economy teeters, the weaker consumption gets.
来自WSJ
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Siegel's playing teeters between flowing abstraction and tangential investigation of his own themes.
来自BBC