The conjunction 与此同时
The conjunction 与此同时 
indicates that two actions are happening in the same period of time.
与此同时 can be placed at the beginning of a sentence and is followed by a comma. It can also be used to connect parts of a compound sentence.
indicates that two actions are happening in the same period of time.
与此同时 can be placed at the beginning of a sentence and is followed by a comma. It can also be used to connect parts of a compound sentence.Examples
与此同时，患病老年人的数量也在增加
At the same time, the number of sick elderly people is increasing
yǔ cǐ tóngshí, huàn bìng lǎonián rén de shùliàng yě zài zēngjiā
与此同时，战斗变得越来越激烈
At the same time, the battle became more and more intense
yǔ cǐ tóngshí, zhàndòu biàn de yuè lái yuè jīliè
几个月之后，他的眼睛开始不停地流眼泪，与此同时他的视力也变得越来越差
After a few months, his eyes began to water nonstop. At the same time, his vision deteriorated
jǐ ge yuè zhīhòu, tā de yǎnjīng kāishǐ bù tíng de liú yǎnlèi, yǔ cǐ tóngshí tā de shìlì yě biàn de yuè lái yuè chà
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