The National Ready Mixed Concrete Association points out that using ashing sumach ash in cement is not a new idea.
国际预拌混凝土协会指出，用灰烬并不是新的方法。
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They plunged into the narrow path between the tall sumach bushes, and were at once hidden in the gloom.
他们钻进高大的漆树丛之间的狭窄小，子就隐没在黑暗中。
Once, and once only, was she completely successful; when she broke down the bough of a large sumach, and by a sudden thought, let her glove fall at the same instant.
，而且只有，全成功了；当折断棵大漆树的树枝时，突然想到，让的手套同时掉了来。
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划词翻译
详细解释
用灰烬并不是新的方法。
，
子就隐没在黑暗中。
希干人（上）
，而且只有
全成功了；当
