Physics
[2017.03.22] 發表
【明報專訊】When you shoot an arrow, don't point it at the centre of the target! If you do, you will miss the target, for gravity drags your arrow downwards. You should aim instead at a point above it because your arrow's trajectory is a parabola.
■Glossary
trajectory (n) 軌迹
parabola (n) 拋物線
[Smarties' Power English Vol 181]
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