Acceleration and velocity are both vectors.加速度和速度都是矢量。Mosquitoes are feared as vectors of malaria.恐怕蚊子是疟疾的传播体。Inertia scalars are defined in terms of quantities called inertia vectors.我们将用惯性矢量来定义惯性标量....
Sporting dogs should be kept out of doors in a kennel.猎狗应该养在户外的狗窝中.Once you have chosen a kennel, don't forget to make a booking for your pet.一旦你选好了养狗场，别忘了为你的宠物预订。The bull - dog lay stretched on the straw outside hi...