序号标准名称符号形式定义和用法1标点句号。此标点符号,主要表示句子的陈述语气。2标点问号?此标点符号,主要表示句子的疑问语气。3标点叹号!此标点符号,主要表示句子的感叹语气。4标点逗号,此标点符号,表示句子或语段内部的一般性停顿。
At that time there were two important things which were worth mentioning: one was the practical knowledge of the Egyptian workers in metals, pottery and dyes;