Add a lettuce leaf, a tomato slice, and a few onion slices.

加入一片生菜叶、一片番茄片和几片洋葱片。

Benjamin, on the contrary, was perfectly at home, and ate a lettuce leaf.

相反，本杰明在家里非常自在， 吃了一片生菜叶。

Sophie took a lettuce leaf from a large jam jar and laid it in the box.

索菲从一个大果酱罐里取出一片生菜叶， 放在盒子里。