But much of the technology needed to add extra is available now.
但是大部分需要增加的新技术目前已经存在。
He Knew the answer now,but he needed to ask one or two more puestions.
他现在知道了答案，可他需要再问一两个问题。
But it was now clear that a change of tack was needed.
但现在很明显的改变钉是必要的。
But now they were far from home, and they needed something to eat.
现在置身荒野的他们，很需要食物。
But now he found himself chafing at an idea: the snake needed to be fed.
此刻他的心情有些不耐烦了：蛇该喂食了。
But now he found himself chafing at an idea: the snake needed to be fed.
此刻他的心情有些不耐烦了：蛇该喂食了。
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