評論
打印
Oh, nice!
好球
They need to figure out how far
他們要根據
the ball needs to travel depending on where the receiver is.
外接球手的位置判斷球應當扔多遠
How fast the receiver's running in that direction.
還要考慮外接球手的移動速度
Most quarterbacks don't sit down and calculate that on paper.
四分衛可沒時間坐下來拿紙算
Set, go!
準備 開始
It's all done in their head
他們不用多想
instinctively without thinking about it.
而是下意識地做出動作
For spacecraft,
對航天器而言
we do it on paper, or these days, on computers.
我們就得用紙算了 現在是計算機算
The other thing a quarterback does
四分衛還要干的一件事
is put spin on the ball.
就是讓球旋轉
Spiral so that the ball flies in the correct trajectory.
旋轉使球保持正確的飛行軌道
So we also are spinning our spacecraft,
我們同樣也會讓航天器旋轉
so it maintains its attitude...
這樣它才能保持姿態
and so that we can point the solar rays back at the Sun
使太陽能板朝向太陽
and communicate back to the Earth.
并與地球保持通訊
And so, the actual rotation of the ball
所以其實橄欖球的旋轉
is similar to the rotation of the spacecraft.
和航天器的旋轉很相似
They make it sound simple,
聽起來很簡單
but firing a spacecraft across the solar system
但是讓一個航天器在太陽系中穿梭
involves some really complex ballistic calculations.
涉及到極其復雜的彈道學計算
重點解釋：
1.figure out 算出；想出
例句：The boy can't figure out the algebra problems.這個男孩做不出這道代數題。
2.sit down 坐下
例句：Move your stern, I want to sit down.你把屁股挪一挪，我想坐下。
3.similar to 跟 ... 類似的
例句：A plantain is similar to a banana.大蕉類似于香蕉。
