Objective To study on changes regulation of ALP and PALP in urine of the pregnant women during various gestational peiods.

目的观察孕尿碱性磷酸酶（ALP）及其胎盘型同工酶（PALP）随孕周的变化规律。

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Dadvand's study suggests how such structural changes could bring about the beneficial effects of green spaces on cognitive development.

Dadvand 的研究表明，这种结构上的变化如何能带来绿色空间对认知发展的有益影响。

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One study compared the effects of high-fear and low-fear appeals on changes in attitudes and behaviors related to dental hygiene.

高恐惧诉求、低恐惧诉求会影响与牙齿卫生有关的态度和行为变化，一项研究对这两者进行了比较。

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This week, we will tell about a study linking activity on the sun to changes in Earth's climate.

VOA: special.2009.09.29

Dinaburg said he became interested in this topic last year at Black Hat when a friend, Robert Edmonds, and Paul Vixie presented on a study of changes observed within the domain name system (DNS).

FORBES: Bitsquatting: Machine-Garbled Internet Connections

As a rule, it's better to hire people who've done something similar before, Khurana says, basing his conclusion on a study of 1, 300 management changes over 17 years.

FORBES: Magazine Article

But the government said the report had been based on a National Audit Office study which focused on "very early days" in the service, since when significant changes and a "marked improvement" had been made.

BBC: Prison education scheme 'failed'