a breakthrough was possible when boyd found that when a dog moves , its head remains relatively still and so performs tike a gyro stabilised platform .
波伊德发现,当一只狗在运动时,它的头部相对稳定,与用陀螺仪固定的平台相仿,这时,突破就成为可能。
choose the card which you tike best, and fill in the following blanks with both your and your friends names and email addresses.