Drag is the force of air resistance pushing against a ball's motion and slowing it down, while lift is a force causing a ball to swerve off a straight path.

拉力是一种物体在空气中所受到的阻力，它能产生与球运行方向相反的作用力，减缓球的运行速度，而升力则是一种能使物体偏离直线运行轨迹的力。

youdao

Feed - the rolling of the ball into the scrum by the scrumhalf. Must be straight down the tunnel.

喂球、投球，指在斯克兰时，九号队员不偏不倚的将球投进斯克兰正中间的通道。

youdao

If you are trying to hit the ball straight down the middle of the fairway and you hook it into the rough, you know that you did not execute successfully.

FORBES: Winning Feedback: Lessons For Managers from The NFL

He who dares stuff from Arafat, who sends the final ball of the over straight down the ground for four.

BBC: SPORT | Cricket | Counties | C&G Final: As it happened

Does the smacking of a small ball straight down a well-mown stretch of grass really require special clothes?

WSJ: Tina Gaudoin on Style: Golf Fashion