The subject of this lecture is horology, the science of measuring time.The

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问题       The subject of this lecture is horology, the science of measuring time.The 【D1】_______ has come a long way since ancient time.It began with such devices as the sundial, where the position of the sun’ s shadow marked the hour. Daylight was divided into 12【D2】_______ hours, which were longer in the summer and shorter in the winter,simply because the amount of daylight changes with the seasons.
      The earliest sundial we know comes from Egypt, which was made of stone. Sundials were used through the classical world, and with time, evolved into 【D3】_______ that would take into account season changes and 【D4】_______ positioning and reflect the hours accurately. This was quite an achievement in technology. Today, sundials can be seen as decorative pieces in many gardens.
      In the 11th century, the Chinese invented the first mechanical clocks. They were large and expensive, and certainly not 【D5】_______ individuals. However, this is the type of clocks we are familiar with today. There have been many developments in clock and watch since then, and they’ ve been greatly improved. However, if your clock or watch makes a ticking sound, then it could well be based on the mechanical movements the Chinese developed a thousand years ago! [br] 【D1】
The subject of this lecture is horology, the science of measuring time. The measurement of time has come a long way since ancient time. It began with such devices as the sundial, where the position of the sun’ s shadow marked the hour. Daylight was divided into 12 temporary hours, which were longer in the summer and shorter in the winter, simply because the amount of daylight changes with the season.
      The earliest sundial we know comes from Egypt, which was made of stones. Sundials were used through the classical world, and with time, evolved into more elaborate devices that could take into account seasonal changes and geographical positioning and reflect the hours accurately. This was quite an achievement in technology.  Today, sundials can be seen as decorative pieces in many gardens.
      In the 11th century, the Chinese invented the first mechanical clocks. They were large and expensive, and certainly not intended for individuals. However, this is the type of clocks we are familiar with today. There have been many developments in clocks and watches since then, and they’ ve been greatly improved. However, if your clock or watch makes a ticking sound, then it could well be based on the mechanical movements the Chinese developed a thousand years ago!

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答案 measurement of time

解析 听力材料中提到“The measurement of time has come a long way since ancient time.”即对时间的测量由来已久,故本空填measurement of time。
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