人们把花扔进两国之间的河里，以此作为兄弟情谊的象征性的行为。
People threw flowers into the river between the two countries as a symbolic act of brotherhood.
电梯制造商希望预先安装电梯门，以此完全消除工人摔落的可能性。
Elevator manufacturers are hoping to preinstall the doors, completely eliminating any chance that a worker might fall.
公司正在研究基因是如何相互作用的，以此寻找可用来判断疾病的起因或者预测药物功效的基因相关性。
Firms are now studying how genes interact, looking for correlations that might be used to determine the causes of disease or predict a drug's efficacy.
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