vi.变直;变得不一本正经;变得随意;松弛;
vt.弄直;伸直;放直;使轻松;
例句:
And the chest strength unbend two arms with the arm department, supports the body.
用臂部及胸部力量伸直两臂, 将身体支撑起来.
To unbend the arm other muscles in the back of the arm have to shorten.
要伸直手臂,背面的肌肉就得收缩.
She finds it hard to unbend, even at parties.
她发现即使在派对上都难以松弛.