For example, in Roman times, engineers discovered that if the upstream supports of a bridge were shaped to offer little resistance to the current of a stream or river, they would last longer.

例如，在罗马时代，工程师们发现如果桥的上游的桥墩建成对目前河流水阻力小的形状，桥墩的寿命会更长。

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Objective To appraise the relationship between fluconazole resistance and expression of the CDR1 gene upstream regulation sequence.

目的探讨白念珠菌耐药基因CDR1基因上游调控序列对氟康唑耐药的影响。

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Objective:To investigate and compare the antibiotic resistance condition of the thermotolerant coliform isolated from the side situated upstream and downstream from hospital sewage discharge point.

目的：了解并比较医院污水污染前后水体中耐热性大肠菌群的耐药情况，初步探讨医院污水排放对自然水环境中微生物耐药性的影响。

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But if advisers put in place by America decide that the country's upstream assets must immediately be privatised, they are likely to meet strong domestic resistance.

ECONOMIST: Finally, a new management team