有许多先进的传感器，可以增强隐形眼镜的能力，但是难就难在如何将它们集成到一起，这也是Parvis和他的同事们不得不亲自动手制作元器件的原因。

There are many advanced sensors that would amplify the lens’ abilities, but the difficulty lies in integrating them, which is why Parvis and his colleagues have had to engineer their own components.

youdao

有许多先进的传感器，可以增强隐形眼镜的能力，但是难就难在如何将它们集成到一起，这也是Parvis和他的同事们不得不亲自动手制作元器件的原因。

There are many advanced sensors that would amplify the lens' abilities, but the difficulty lies in integrating them, which is why Parviz and his colleagues have had to engineer their own components.

youdao

我们会发现，许多功课非常难，但是我们得记住，那些功课越难，将来对我们的益处就越大--只要我们能持之以恒，完全弄懂。

We shall find many of our lessons very hard, but let us consider that the harder they are the better they will do to us if we will persevere and learn them thoroughly.

youdao

The first study, the one with the deceptive dolls with the big shoes and little shoes, is actually fairly difficult.

第一个研究用了有欺骗性的,穿着大鞋和小鞋的洋娃娃,实际上是非常难的

耶鲁公开课 - 心理学导论课程节选

and she's now playing some pretty fairly difficult things considering that she has only taken for a couple of years. So,

尽管她才学了几年，她现在已经可以弹奏比较难的曲目了。所以，

和钢琴老师 - SpeakingMax英语口语达人

One is inertial mass, which is how much you hate your velocity to change, how hard you resist acceleration.

一个是惯性质量,它反映了物体速度改变的难易程度,即保持加速度的难易程度

耶鲁公开课 - 基础物理课程节选