The derivative limit theorem may draw out the left (right) derivative limit theorem and about the region end point.

导数极限定理可以引出左(右)导数极限定理、区间端点导数极限定理。

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The left end represents now, and the right end represents a point in the future.

左端代表着现在，右边代表着未来的某个时刻。

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You look at the track field athletes, such as a rabbit-like Jiao left the starting point, such as Li Jian as towards the end, attracted the presence of the audience excited.

你看那径赛场上的运动员，一个个如矫兔般飞离起点，像利箭般冲向终点，引得在场的观众兴奋不已。

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It never would've happened if defenseman Ryan McDonagh hadn't deftly kept the puck in the Washington end just before it was about to leave the zone at the left point.

WSJ: Rangers look to get even with Caps in Game 4

Dan Girardi's shot from the right point was wide of the net but it bounced off the end boards right to Hagelin on the left doorstep for a stuff-in.

WSJ: Del Zotto has goal, assist on Nash winner for NYR