In 1928, doctors developed a portable, metal device with pumps powered by an electric motor.

在 1928 年，医生发明了一种便携式金属装置，气泵由电动机供能。

The metal device covers the top of a finger to protect it from the sewing needle.

这个金属棋子覆在手指上方，可以保护手指不被针扎到。

" Grilling, " you already know, means to cook something on top of this metal device.

“烧烤”，你已经知道，意思是在这个金属设备上烤东西。