But neighbourhoods have also changed, with the local services such as post offices that tended to form the heart of old communities on the decline.

但邻里关系也发生了变化，当地的服务设施比如本应该建在老年社区中心的邮局的数量也减少了。

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After 1815 this older form of manufacturing began to give way to factories with machinery tended by unskilled or semiskilled laborers.

1815年后，这种古老的生产方式开始让位于那些由无技能或半熟练工人操作机器的工厂。

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Some CGCs tended to bend at certain part to form a S-shaped center.

其他CGC在菌体某一部位弯曲形成“S”形中心的自旋体。

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People with a rare genetic form of Alzheimer's, whose specific genetic mutations guarantee that they will develop the disease, tended to show signs of amyloid plaques in PET scans and cerebrospinal fluid 10 to 20 years before the onset of symptoms.

CNN: Alzheimer's: Early detection, risk factors are crucial