约翰·柯蒂斯用云杉树液做出了美国第一个包装口香糖。
John Curtis created the first American packaged gum using spruce sap.
高大的红杉树肃然沉静，美国印弟安人称这种树为沉默者，现在它们真的是默默无语。
The great redwood trees were absolutely still; the American Indians call them the silent ones and now they were really silent.
高大的红杉树肃然沉静，美国印弟安人称这种树为沉默者，现在它们真的是默默无语。
The great redwood trees were absolutely still; the American Indians call them the silent ones and now they were really silent.
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