A four-year study in the experimental class is a process full of challenges and setbacks.

在尝试班进修的四年是一个充溢应战与波折的过程。

youdao

The four-year study involved about two thousand five hundred women with the genetic mutations.

有2500名基因突变的女性参与了该项为期四年的研究。

youdao

A four-year study suggests that, in the short and long term, both partners are more contented if the woman has a lower Body Mass Index.

一个历时四年的研究表明，不论从短期还是长期来看，假如女方的体重指数较低，夫妻双方会更满意。

youdao

The four-year study looked at the health,diversity and biological make-up of the reef.

VOA: special.2010.08.10

A study in the United States found that eighty-four percent of undergraduates last year had at least one credit card.

VOA: special.2009.05.28

The average published price for undergraduate study at a four-year public college was about seven thousand dollars.

VOA: special.2010.04.08

Couch potatoes were also about 50 percent more likely to die of any cause during the four-year study.

CNN: Too much TV time may hurt your heart

Researchers are aware that a similar four-year study led by the United Nations Aids group on another gel, was unsuccessful.

BBC: Seaweed gel could protect against HIV

Under a four-year study, one third of the women will be given the gel, one third a placebo and one third will not receive any, while all will be given condoms and taught about their use.

BBC: Seaweed gel could protect against HIV