语言一直都在变化：那是条流动的溪水，不停地在转换、变换，接受千条支流的新生力量，丢弃旧形式。
The language is perpetually in flux: it is a living stream, shifting, changing, receiving new strength from a thousand tributaries, losing old forms in the backwaters of time.
勘测亚马逊河支流的美国探险家戈登·麦克里奇曾记述说，他凌晨3点就听见印第安人起身，深感愕然。
Gordon MacCreach, an American explorer in these Amazon tributaries, reported that he was startled to hear the Indians get up at three in the morning.
合作联盟在其报告里承认确定河流源头的方法有很多种，包括河流距离海洋的最远点，最大支流的源头等等。
The partnership acknowledged in its report that there were numerous ways of determining the source of a river, including the furthest point from the sea or the head of the most dominant watercourse.
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