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However, the molecular mechanisms underlying premature aging up 8-MOP/UVA are as yet unknown. In our studies, dermis of the non-lesion back skin of vulgar psoriatic patients who had been treated by PUVA and the cultured foetus dermic fibroblasts were selected to be observed.

本课题以PUVA治疗寻常型银屑病患者背部非皮损区真皮及培养的胎儿真皮成纤维细胞为对象，采用HE染色、Verhoeff染色、电镜、酶组织化学、免疫组织化学、原位杂交、流式细胞计数仪、三引物PCR、PCR-SSCP技术及PCR产物直接测序等技术和方法，研究了8-MOP/UVA对皮肤光老化形成的影响及芳维A酸乙酯的拮抗作用。

The limiting magnitude of an astronomical instrument is the magnitude of dimmest celestial object that can be observed by that instrument.

天文仪器的极限星等是指，该仪器能探测得到的最暗淡天体的星等。

It was found that the dropwise and the film are coexisted in the condensation process, but only film condensation can be observed on the carbon steel surface.

进一步的凝结传热实验结果表明，高磷非晶镀层表面具有明显促进珠状凝结的效果，在凝结过程中表现为珠膜共存状态，而碳钢管表面仅出现膜状冷凝。

Strict and sloppy interpretations ambiguity as well as locality effect and the eliminative puzzles are typical properties of VP ellipsis in English, while these properties can be observed in null object constructions and some similar elliptical constructions in Chinese.

英语动词短语省略具有三个如下的典型特征：严格与松散释义歧义、局部性效应以及删除性难题。而汉语的零宾语结构与其他一些类似的省略结构也显示了这些特征。

In the culture of the protoplast, the first division occurred within 3 to 5 days, and the embryogenic cell cluster could be observed 30 days after culture.

叶肉原生质体培养，在3—5d开始第一次分裂，并能持续分裂至形成胚性细胞团。

The first is: what epistemological norms must be observed?

第一个问题是：科学家在科学认知活动中要遵守哪些认知规范？

Crystals can be observed both inside and outside of the exosporium when co-expression of these two genes.

透射电镜下观察到cry26和cry28基因同时表达在芽胞外壁内侧和外侧都可形成内含体。

Changes of dielectric property of gastrocnemius induced by simulated weightlessness can be observed effectively by frequency domain impedance technique.

利用频域阻抗技术可以有效地观察到模拟失重导致的腓肠肌细胞介电特性发生的改变。

This signal may be observed, but not gated.

可以观察这一讯号但不必进行监控。

The gingivae can be observed for capillary refill time.

齿龈可用来观察微血管再充血时间。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！