Cross the road one at a time don't bunch up.
一次一个地过马路--别都挤在一起.
About once a season.
大概一个季度去一次。
We'll have a meeting every month.
咱们一个月碰头一次。
I can only take care of one person at a time.
我一次只能发给一个人。
Once he went to the theatre alone.
有一次，他一个人去看戏。
movement once around a course.
围一个圈绕的一次运动。
bimestrial:Occurring every two months; bimonthly.
一月两次的:每两个月发生一次的;一月两次的。
Occurring every two months;bimonthly.
一月两次的每两个月发生一次的；一月两次的
A nobleman and a merchant once met in a restaurant.
一次，一个贵族在饭店碰到一个商人。
I go jogging three times a week.
我一个星期慢跑三次。
Happening every two months.
每两个月发生一次的
How many stops are there on our route ?
这次车一共有几个站?
Are they in the same class?
是同一个档次的货吗？
4 units from the first purchase
第一次购货的4个单位
an intended trip abroad next month.
下个月的一次出国旅行
Once per session
每个阶段作业比较一次
Need secondary IP address.
需要一个次要 ip 地址。
He carried six boxes at a time.
他一次拿六个盒子。