You should think of delta t as relatively small.
你要把△t看成很小的量。
t Well, let's take a small time interval, delta t.
来取很小的时间间隔△
So, now if I divide both sides by delta t, I get this.
如果我两边同时除以△t，就会得到这个。
The angular momentum change must be torque t times delta t.
角动量的改变就是,力乘以δ
t OK, so, delta s over delta t, that's the distance traveled divided by the time.
所以△s/△,就是这段时间所走过的距离。
Cp And delta T is given by the heat, which has to do with how much of the candle burnt, divided by the constant pressure heat capacity.
T等于热量q除以恒定的等压热容，其中热量与，蜡烛燃烧的多少相关。
r So, let's remember that the amount by which we moved, t delta r, is approximately equal to v times delta t, OK, and just using the definition of a velocity vector.
所以记住移动的量△,约等于v*△,这是用速度矢量的定义。
The sedimentary systems in the T-R cycle: fluvial fan, fan delta, common delta and lacustrine sedimentary system.
识别出扇三角洲、远（近）源三角洲、水下扇及浅湖、深湖-半深湖等沉积体系。
The sedimentary systems in the T-R cycle: fluvial fan, fan delta, common delta and lacustrine sedimentary system.
识别出扇三角洲、远（近）源三角洲、水下扇及浅湖、深湖-半深湖等沉积体系。
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