美 
											['juːnɪt]
																
										
							group with a special function within a large or complex organization
quantity chosen as a standard in terms of which other quantities may be expressed, or for which a stated charge is made
a part of a complex whole book
part with a special function within a large or complex machine
																																	"the dollar is the United States unit of currency"
																							"a unit of wheat is a bushel"
																							"change per unit volume"
																															
																																	"the reduced the number of units and installations"
																							"the word is a basic linguistic unit"
																															
																																	"the coach said the offensive unit did a good job"
																							"after the battle the soldier had trouble rejoining his unit"
																															
																																	"an idea is not a unit that can be moved from one brain to another"
																															
																																	"units of nucleic acids"
																															
																																	"how big is that part compared to the whole?"
																							"the team is a unit"
																															
Three tubes count the hundreds, tens and units respectively.
出自:Engineering