艾米挺直身子，举起了身上的担子。

Emmy straightened, hefting her burden.

《柯林斯英汉双解大词典》

一阵笑声使他挺直身子，向四周看了看。

A burst of laughter made him straighten himself and look round.

youdao

克拉拉挺直身子，在她的朋友身边稳步走着。

Upright and firm, Clara walked beside her friend.

youdao

When I see birches bend to left and right Across the lines of straighter darker trees, I like to think some boy's been swinging them.

当我看到白桦树弯下身子，向左，也向右,穿过排列成行的挺直黑黑的树，我总以为有个孩子把白杨“荡“弯了。

耶鲁公开课 - 现代诗歌课程节选