1.
The tennis-service needs more strngth.
网球式发球需多点力度。
2.
Steering gear Type recirculating ball-type
转向器型式循环球式
3.
I always use the tennis-serve when I serve.
我常用网球式发球法发球。
4.
1: General;2: Wheel;3: Ball;4: Rolling;5: Blade
常规;2: 轮式;3: 球式;4: 滚筒式;5: 叶片式
5.
I can hit it harder with the tennis-serve.
我可用网球式发球法来将球击得更有力些。
6.
American football
美式足球, 橄榄球
7.
(in tennis,etc)act or manner of serving the ball;person's turn to serve
（网球等的）发球,发球方式,轮到的发球权
8.
make a cannon, in billiards.
打台球中炮弹式发球。
9.
This is the way we play the ball, paly the ball, play the ball.
这就是我们打球，打球，打球的方式。
10.
This is the way we catch the ball, catch the ball, catch the ball.
这就是我们接球，接球，接球的方式。
11.
a play by the offensive team in a football game.
（美式足球或橄榄球）球队进攻。
12.
This is the way we throw the ball, throw the ball, throw the ball.
这就是我们投球，投球，投球的方式。
13.
A body with the shape of a sphere, especially a representation of the earth in the form of a hollow ball.
球，球状物球体，球状物，尤指中空的球的形式的地球仪
14.
a version of football in which the ball carrier is touched rather than tackled.
一种足球模式掌握球的人不是踢球而是触球。
15.
American football is different from international football, which Americans call soccer.
美式足球，即橄榄球，与国际足球不同，美国人称后者为英式足球。
16.
a score in American football; being in possession of the ball across the opponents' goal line.
美式橄榄球中的得分；抱着球越过对方球门线。
17.
A fast low serve in tennis.
炮弹式发球网球中一记又快又低的发球
18.
American football, not to be confused with the football called soccer, is the American national sport.
美式足球是美国的国球，不能与足球混为一谈。