These steps , known to microbiologists as Koch's postulates, were established in the 19 th century.这些微生物学家称之为柯赫氏法则的步骤确立于19世纪.Almost all of the techniques that microbiologists use are customized for life as we know i...
1998年的资本外流量为220亿元。There was a capital outflow of $22 billion in 1998.这条河平均流量为每秒二百立方米.The average flow of the river is 200 cubic metres per second.按摩有助于增加身体特定部位的血液流量。Massage may help to increase blood flow to specific are...