檢視第二份英文作業/2019.02.11-2019.06.30/李彥廷的原始碼

===2019.03.04~2019.03.08===
[https://tw.voicetube.com/videos/21103 時空基礎理論]
====文章====
This video was talking about what space-time means for gravity.First,acceleration was mentioned.If you add gravity,The speed of the things in space-time will be faster. Second,The movie discuss how to make up the space-time.There must have a lot of patches of space time transformed by different amounts.When fragments was assemble like a quilt,space-time has shaped.

When we are discuss space-time,we must think of  Einstein.He can  describe precisely how each patch is stretched and squashed according to nearby mass and energy.He found that the presence of stuff curves the space-time,and curving space-time moves the stuff around.This is  gravity and space-time that Einstein explained.

Einstein's theory reversed older theories where space-time and gravity were separated.When combining piece of space-time,there have wrinkles in the space-time material.These are called  gravitational waves.Einstein proved that gravity was relate to space-time.