fall of stream 河流落差
Last fall a beaver moved into the small stream beside our house.
去年秋天，一只海狸搬进了我家旁边的小溪里。
The height of the fall is so great that the stream of water atomizes into a cloud of mist, then trickles back together at the bottom of the plunge and continues on through a cascading run of rapids.
瀑布是下降的高度非常之大，以致使部分流水喷成雾状成为模糊不清的云朵，然后汇成细流与大瀑布一起跌到山下的底部，并继续穿越几个像小瀑布那样的飞奔急流。
You can watch a live stream of Apple's fall event tomorrow, the company has announced - but only if you're using an Apple device.
苹果公司宣布：你可以通过直播流媒体观看明天的苹果秋季大会——前提是你使用苹果的设备。
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