All participants must address how communication or transportation technology has promoted the quality of life for Americans throughout history.

所有与会者都必须阐明，通讯或交通技术在整段历史上如何提高美国人的生活质量。

youdao

All participants could see the colour chosen by some of the other people, but certain participants had an extra advantage: the ability to see more of the participants' chosen colours than others.

所有的参与者都能看到其他人选择的颜色，但某些特定的参与者有一个额外的优势：他们比其他人看到更多参与者选择的颜色。

youdao

All participants will receive a certificate of participation in the contest.

所有参赛者将获得参赛证书。

youdao

Speaking just hours before the start of the G20 meeting of major economies, Mr.Obama stressed the need for all participants to seek common ground.

VOA: standard.2009.04.01

It all starts with that free pedometer participants receive by mail.

VOA: standard.2010.07.16

All the participants were given condoms and counseling for three years.

VOA: standard.2009.10.20

Values at the start of the study were much the same among all participants, averaging 3.2.

ECONOMIST: Praying for your partner stops you straying

Before the trial, all participants had been consuming between 1, 800 and 2, 200 calories a day.

ECONOMIST: A magic elixir is shown to promote weight loss

All participants could eat as much as they wanted and didn't receive any exercise advice.

WSJ: Mediterranean Diet of Olive Oil, Nuts, Reduces Heart Disease, Study Finds