他无力地耸耸肩，扭动身体想要挣脱。He gave a feeble shrug and tried to squirm free.他扭动身体，挣开背包的肩带。He squirmed out of the straps of his backpack.她痛苦地扭动着，全身都汗湿了。She was writhing in pain, bathed in perspiration....

“扭动”的英语可以翻译为：twist，wreathe，wring，writhe ...