chief ק��ʱ����ͬ����ְλ��ߣ�Ȩ�����ָ��ʱ����ͬ��������Ҫ����ֵ��ߡ� principal ������ʱ��ָ��λ���������ˣ�������ʱ��ָ�����ڴ�С����Ҫ�Եȷ���������� main ͨ��ֻ�����ָ��һ����Χ�ڣ�ij�����Ҫ�ԡ�����������ȳ�������� major ָͬ�����˻�������������Ƚϣ��Եø�����Ҫ��ͻ���� leading ����ָ����Ӱ���������������Ӷ������������������á� capital ����ָ����Ҫ�ԡ����塢��Խ���ش������ͬ��֮�ס� foremost ����ָ���н���չ�����о���λ�� primary ͨ���������ˡ�������ʱ��ָ����Ҫ�Է���ռ��һλ��
�����
1. Restoring control to primary controller. �ָ����������Ŀ��ơ�
2. Received command to return control to primary controller. ���յ��ָ������������Ƶ����
3. Low birth weight infant is a primary commonality health problem in the world. �ͳ�������������������һ����Ҫ�Ĺ����������⡣
ӢӢ����
n.
1. a preliminary election where delegates or nominees are chosen
2. one of the main flight feathers projecting along the outer edge of a bird's wing
3. coil forming the part of an electrical circuit such that changing current in it induces a current in adj.
1. of first rank or importance or value; direct and immediate rather than secondhand
2. not derived from or reducible to something else; basic
3. most important element
4. of or being the essential or basic part
5. of primary importance