When an element of the requirements chain changes, all the trace relationships are marked as suspect, as shown in Figure 28.
当需求链的某个元素发生变化时，所有的跟踪关系都会标记成可疑，如图28所示。
One problem was solved but now 30 years later a concrete channel without a trace of nature is not anymore an acceptable element of the urban infrastructure system.
它在当时确实缓解了问题，但在30余年之后，一条毫无自然形态的混凝土渠道已经不能满足新加坡城市基础设施的功能和景观需求。
An investigation of the trace element contents in grain, vegetable and water was carried out in both endemic and non-endemic areas of goiter and cretinism in Yunvang, Hubei Province.
本文报告了湖北省郧阳地区地甲病、地克病病区与非病区粮食、蔬菜和饮水中微量元素的测定分析结果。
Fluorine is an important trace element closely related to health, and some diseases in living organisms may arise from the abnormal distribution of fluorine in the environment.
氟是一种重要的微量生命元素，环境中氟过量或缺乏都会导致机体产生疾病。
An analysis of trace element and oxide enrichment pattern is carried out by using factor analysis method.
利用因子分析法对微量元素和氧化物的富集规律及其环境意义进行了探讨。
Selenium is an essential trace element in human. Selenoprotein is a protein that Se in the form of selenocysteine participates in the formation of protein.
硒蛋白是人体必需微量元素硒以硒代半胱氨酸的形式参与形成的蛋白质。
Selenium is an essential trace element in human. Selenoprotein is a protein that Se in the form of selenocysteine participates in the formation of protein.
硒蛋白是人体必需微量元素硒以硒代半胱氨酸的形式参与形成的蛋白质。
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