They had left school at fifteen and were quite untutored in writing.他们15岁就辍学了，几乎未接受过正式的写作训练。This untutored mathematician had an obsession with numbers.这位非科班出身的数学家对数字特别痴迷。Oliver envied the fine person and dignified manner...
通过已知数可以算出未知数.The unknown number can be calculated from the data.反射允许在运行时检查已知数据类型.Reflection allows known data types to be inspected at runtime.在微分方程组中驱动力作为已知数, 所以驱动力直接影响着微分方程组的求解结果.The force is given in the differential ...