就让我们以问个简单的问题开始。
再问个简单的问题:,加速度和绳子的张力,都是多少?
So now I could ask you a simple question: what is the acceleration and what is the tension in the string?
首先问个简单的问题:你是从什么时候开始攀岩的?为什么?是什么驱使你开始攀岩的?
Let's start with a 'warm-up' question: When did you start climbing and why? What drove you to it?
So let's start by asking a simple question.
就让我们以问个简单的问题开始。
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