王婷婷

1 Many people use their phones to count their steps. Their daily aim is 10，000 steps. Yet the con? cept of taking 10， 000 steps a day to keep fit is rooted not in science but in a marketing trick. In the 1960s， a company in Japan invented a pedom? eter （計步器）. Because the Japanese character for 10，000 looks like a person walking， the company called its device the 10，000?step meter.

2 “If you get 10，000 steps， it seems like a good goal. But there wasn？？t really any basis for it，”says I?Min Lee， an epidemiologist （流行病學家） at Harvard Medical School. The current physical activity guidelines from the US Department of Health and Human Ser? vices， published in 2018， are still based on time.

3 The experts recommended broad exercise ranges rather than step counts： 150 to 300 minutes of weekly moderate activity （for example， quick walking） or 75 to 150 minutes of vigorous activity （for example， jogging） during the same period. There simply wasn？？t enough evidence to make a similar determination of steps.

4 Now evidence of steps is starting to come in. In 2019， Lee published one of the first studies specifically investigating the actual effects of meeting the 10，000?step goal. Several other large studies followed. The result is that some movement is good， and more is better， but the benefits taper at some point. Your personal peak depends on your age. People younger than 60 should indeed walk 8，000 to 10，000 steps a day to get the best benefits in terms of the lifespan and heart health. People older than 60 show the most benefit between 6，000 and 8，000 steps.

5 Lee says，“Per step， older people expend more energy. As a result， they need fewer steps to achieve the same benefits. But adding a few thousand steps a day can beespecially meaningful for someone who isn？？t physically able to walk quickly.”She con? cludes that people who are the least active have the most to gain.

ReadingCheck

1. What is the function of paragraph 1？

A. To prove the meaning of 10，000 steps per day.

B. To clarify the mistaken belief of 10，000 steps.

C. To introduce a Japanese technology product.

D. To explain why Japan invented a pedometer.

2. Who may benefit most from increased steps according to Lee？

A. Those who have broad exercise ranges.

B. Those who are older than 60 and love sports.

C. Those who seldom have physical activity.

D. Those who are able to walk quickly.

3. What does the underlined word“taper”mean in paragraph 4？

A. Decrease. B. Insist. C. Expand. D. Increase.

語篇解碼

很多人用手機計算步數(shù)，希望完成每天10，000步的目標。本文就10，000步目標的實際效果展開專門的調(diào)查研究，研究發(fā)現(xiàn)10，000步定律并不適用于所有人。

語言學習

Ⅰ. 語料薈萃

Ⅱ. 語句分析

1. There simply wasnt enough evidence to make a similar determination of steps. 只是沒有足夠的證據(jù)來對步數(shù)做出類似的測量。

【點石成金】本句使用了There be...句型；句中的determination意為“測量；計算”。

2. But adding a few thousand steps a day can be especially meaningful for someonewho isnt physically able to walk quickly. 但每天增加幾千步對那些身體不能快速行走的人來說尤其有意義。

【點石成金】本句中，adding a few thousand steps a day是V?ing 形式作主語；who引導定語從句，并在從句中作主語。

語言運用

Ⅰ. 例句仿寫

1. 拐角處有一家餐館。

around the corner.

2. 然后瑪麗走了進來，我們之前一直在談論她。

And then Mary walked in， .

Ⅱ. 寫作實踐

假定你是某國際學校的學生李華，你校體育老師要舉辦馬拉松社團活動，讓有意愿參加的所有學生先完成每天8千米的跑步任務，你對此有意見，請你說明原因并提出建議。

注意：

1. 詞數(shù)80左右；

2. 可以適當增加細節(jié)，以使行文連貫。

Dear sports teacher，