keep upright短语¹⁴⁴⁹⁷²⁺² 基本例句 vi.勿倒置 If you stand on one leg and observe for a time what you do to keep upright, you may notice that the adjustment to your posture can happen anywhere from your ankles all the way to your head. 一如果用一只脚站立保持身体直立姿势一段时间后你就会发现：身体为保持这个姿势做出的调整是从下到上各个部位的。 blog.sina.com.cn