Three primary methods of aerial delivery are used for equipment or supplies.

设备空投主要有三种方法。

youdao

The initial diagram provides for three primary classes.

原始图规定了三个基本类。

youdao

There are three primary reasons to create Value Stream Maps: objectivity, clarity, and persuasion.

创建价值流图主要有三个原因：客观性，清晰性以及说服力。

youdao

At the week-long conference, participants are focusing on three primary roadblocks to getting and keeping girls in school: violence,poverty and the poor quality of education being offered.

VOA: standard.2010.05.19

During Grail's three-month primary mission, the spacecraft orbited at an average altitude of 55km.

BBC: Nasa reveals new information about moon probes crash sites

In his first bid for mayor in 1983, he finished third in a three-person Democratic primary.

ECONOMIST: Mayor Daley��s arboretum

In its School Organisation Review, Suffolk County Council is replacing the three-tier system of primary, middle and secondary schools with the two-tier system which cuts out the 40 middle schools.

BBC: Suffolk's middle schools closure programme starts