人类是不对称的动物，在我们胚胎发育的早期，心脏就转向了左边，肺则往右长，而且左、右肺具有完全不同的结构。
Humans are asymmetric animals. Early in our embryonic development, the heart turns to the left. The liver develops on the right. The left and right lungs have distinct structure.
在图像区域的左边和右边有左箭头和右箭头。
To the left and right of the block of images are left and right arrows.
会场左边的人控制左球拍，右边的人控制右球拍。
Folks on the left side of the auditorium control the left paddle. Folks on the right side control the right paddle.
应用推荐