London has a population of ten million.

因为 a population of 是固定搭配,表示人口是多少 millions of 解释为“数以百万”的。 但是,如果具体地说出二百万、五百万等,则 million 后没有 s ,也不用 of: 例如：two million smokers。 高考题 1。 __ people in the world are sending information by E-mail every day。 (2001 上海) A。 Several million B。 Many millions C。 Several millions D。 Many million (A。) 2。 Shortly after the accident, two __ police were sent to the spot to keep order。 (MET。 1992) A。 dozen of B。 dozens C。 dozen D。 dozens of (C。)