sinuously
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Sounds like
seriously
认真;严重;严肃
sinuous
弯曲的;波状的;蜿蜒的;曲折的;错综复杂的;动作柔软的;转弯抹角的;间接的;不老 …
strenuously
费力地
securely
安心地
sinuousness
弯曲的;错综复杂的;蜿蜒的