Rails运行所有还没运行的迁移上的up方法。
Rails runs the up methods on all migrations that haven't been run yet.
其焦点在应用程序的迁移上，但同时也介绍了针对分区数据库的设计、配置和操作考虑。
The focus is on application migration, but design, configuration, and operational considerations for a partitioned database is also covered.
以股票价格为例。股票价格随着时间的推移上涨的根本原因在于股票价格与公司正在生产的产品和服务有关。
The fundamental reason why equity prices rise over time, for example, is that they are linked to the goods and services being produced by companies.
近年来研究发现，趋化激素与其受体在癌细胞的增生、血管新生与转移上扮演重要的角色。
Recently, it was found that chemokines and their receptors were involved in proliferation, angiogenesis and metastasis of various types of cancer cells.
它慢慢地移上了楼梯，一步一步。
然后论述了约束加在虚位移上的条件及其线性化的两种方法之间的联系。
Then it deals with the condition exerted on virtual displacement by restraint and the connection between the two methods of linearization of the restrained condition.
腹腔化疗在治疗和防止胃癌术后腹腔内复发转移上比传统静脉化疗具有优势。
Intraperitoneal chemotherapy has more supremacy than traditional vein chemotherapy in control and treatment of recrudescence and diversion at peritoneal for gastric cancer patient after operation.
主要集中在对器件施加nbt和随后的PBT应力后器件阈值电压的漂移上。
We mainly focus on the threshold voltage shift under subsequent positive bias temperature (PBT) stress after the preceding NBT.
而在他的新片《24城记》中，贾再一次将思绪放在了迁移上。而这次的迁移却不是因为水位上涨而引起的。
In a new film, "24 City," Jia is once again pondering displacement, but not because of a rising river.
实验结果表明：经热处理法得到的仿古玉样品的拉曼谱图同未经热处理的软玉原料的拉曼谱图相比在位移上有显著差异。
The results of the tests showed that the Raman spectra for the forgeries were significantly different from those for unheated nephrite.
多项研究提示，EBUS - TBNA在判断恶性肿瘤纵隔淋巴结转移上，显示出良好的灵敏度及特异度，优于目前部分常规检查。
A lot of studies showed that EBUS-TBNA had good sensitivity and specificity in diagnosing mediastinal lymph nodes metastasis of malignant tumors, which was even superior to other common examination.
多项研究提示，EBUS - TBNA在判断恶性肿瘤纵隔淋巴结转移上，显示出良好的灵敏度及特异度，优于目前部分常规检查。
A lot of studies showed that EBUS-TBNA had good sensitivity and specificity in diagnosing mediastinal lymph nodes metastasis of malignant tumors, which was even superior to other common examination.
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