For too many of us, learning appears to be a surrender of our own will to external direction, a sort of enslavement.

对于我们中间的很多人，学习似乎是我们自己的意志向外部力量的屈服，有那么点像奴役。

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If you're used to having a lot of external direction, it can be really tough to motivate yourself when you're totally in charge of your own time.

一旦你习惯于许多的外部指令，当你可以完全掌控自己时间的时候，推动自己去做某事将会是很困难的。

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In some cases, it can be possible to use external stimuli to change the direction of a dream.

在一些案例中，运用外在刺激来改变梦的方向是可能的。

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Adjacent lenses in O. wendtii are generally attached to the same individual plate of the external skeleton, so they all point in more or less the same direction.

ECONOMIST: Brittlestar eyes