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Because a piano is made primarily of wood, it's affected by changes in temperature and humidity which cause the soundboard to expand or contract slightly during these changes.

因为一架钢琴主要是由木材制成的，木材受到温度和湿度影响会引起音板轻微的膨胀和收缩。

The results indicated that the relationships between specie diversity and productivity changes with temporal and spatial scales changes.

结果表明，当空间和时间尺度发生变化时，多样性与生产力的关系会随之发生一定的变化。

In addition to studying adverse events and immune response, researchers will look for any effect the vaccine may have on asthma indicators, including changes in spirometry after vaccinations, changing asthma severity, and changes in the Asthma Control Questionnaire.

除了评价不良事件和免疫应答外，研究者还将探讨这种疫苗对哮喘指标可能产生的其他影响，包括接种后肺活量的变化、哮喘严重程度的变化以及哮喘控制问卷的得分变化。

The histopathological changes of inoculated duckling were observed.The result showed that the death peak was in 24-48 h with the mortality of 80%.The histopathological changes were hemorrhagic necrotic hepatitis,necrotic splenitis,pancreas limitation coagulation necrosis and heterophil infiltrating into renal leaflet,respectively.

结果表明，接毒后 2 4～ 48h为感染鸭死亡高峰，试验发病的死亡率为 80 %；感染雏鸭肝、脾、胰、肾的组织病理变化分别表现为出血性、坏死性肝炎，坏死性脾炎，胰局灶性坏死及肾小叶的异嗜性粒细胞浸润。

The changes will reflect its goals of bringing its spread-out video content into a more centralized location, and the changes are set to be finished by the end of the year.

雅虎原本计划更集中的发布视频内容，但这个转变会对这一目标造成一定影响，据说这种转变预计将在今年年末完成。

Changes of HRV induced by inhaled anesthesia, jaw thrust, and lateral positioning procedures corresponded to changes in the stridor score of children with OSAS.

吸入麻醉、托下颌叾侧卧位导致的HRV攦otilde；变与OSAS儿童喘鸣音评分的攦otilde；变相符。

Methods To apply MMT colourmetric method and flow cytometry to test Rhizoma Bolbostematis, Products in different density to Tcb8113 cell proliferation-inhibitory rate and the changes and apoptosis rate of different phases in cell cycle and obserce its changes of subcellar structures through electromicroscope.

应用MTT比色法和流式细胞仪检测不同浓度的土贝母制剂对Tcas113细胞增殖抑制率及细胞周期各相的变化和凋亡率，并通过电子显微镜观察其亚细胞结构改变。

Methods］ MTT assay was employed to test the lethal concentration 50 (IC50) of sensitive germline (SK-OV-3) and ovarian cancer cell subline induced by ADR (SK-OV-3/adr) treated by 4 drugs, resistance index and reverse multiple were calculated. The changes of drug content were observed by fluorescence microscope, the intracellular accumulation of ADR was evaluated by fluorospectrophotometry, the changes of mdr 1/P-gp resistance were observed respectively by RT-PCR and Western blot.

方法］MTT法检测药物对敏感细胞株（SK-OV-3）和诱导的耐药细胞株（SK-OV-3/adr）的半数致死浓度（IC50），计算耐药指数和加逆转剂后的逆转倍数，荧光显微镜观察不同时间细胞内的药物含量变化，荧光分光光度法测定细胞内ADR的含量，RT-PCR和Western blot法检测细胞耐药前后mdr1/P-gp的变化。

Through analysis of the 1999/2000 background field of winter circumfluence, we find that the changes of West Pacific subtropic high and polar vortex are important factors that affect the changes of winter climates characters of our countrys and decay or melt of sea ice in the Bohai Sea .

通过对1999／2000年冬季环流背景资料的分析，发现西太平洋副热带高压和极涡的变化是影响我国冬季天气气候特征变化和渤海海冰生消的重要因素，而副热带高压和极涡等大气活动中心的变化又与赤道东太平洋的厄尔尼诺现象及拉尼娜现象有关。

Water in Lake Sugan is supplied by the groundwater and stream infiltration from shallow groundwater and all of them are supplied by the melt-water of Qilian Mountain. Inthis situation the hydrological changes of the lake is the primary reason for theδ~(18)O changes in lake water.

苏干湖湖水来源于地下水和浅层地下水出渗形成的短小河流，两者都来自祁连山冰雪融水，湖泊水文变化是目前湖水δ~(18)O变化的主要原因。

Tom: You are right, he worked hard all the time.

你是对的。他一直都是努力工作。

Take shortcomings,failures,and mockings of others as commonplace and a drive to complete oneself,hold your own opinion over the evalution and disscution divested from others,afterwards sink into the state of eliminate mistakes if any or encourge oneself being not being influenced by the sayinngs of others or having no ideas to do.

把缺点、失败及别人的耻笑等看成是一种常事，当成完善自己的动力，对别人的评价和议论自己心中有主见，做到&有则改之，无则加勉&，不为人言所左右或无所适从。