在实验室条件下用圆盘试样模拟了钢轨的接触条件。
The contact condition of rail was simulated with twin - disk in laboratory.
Kapil Siba说：“富裕家庭的学生能够接触到数码世界，但普通或者贫苦家庭的孩子却没有这样的条件。
The rich have access to the digital world, the poor and ordinary have been excluded.
物质与反物质在正常条件下接触时会彼此毁灭。
Matter and antimatter destroy each other when they come into contact under normal conditions.
物质与反物质在正常条件下接触时会彼此毁灭。
Matter and antimatter destroy each other when they come into contact under normal conditions.
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