�����

1. Respiratory quotient (RQ) The ratio of the volume of carbon dioxide evolved during respiration to the volume of oxygen absorbed: RQ=volume CO2/volume O2 .
�����̣�RQ�������������в��뷴Ӧ�Ķ�����̼��������������������֮�ȡ���RQ=���CO2/���O2��
2. Please give me two fifty dollar bills and five twenty dollar bills.
�����������ʮ��Ԫ�ij�Ʊ�����Ŷ�ʮ��Ԫ��Ʊ��
3. Usually the U. S. dollar will result in dollar-denominated commodities such as oil prices fell, because investors holding other currencies more expensive for the oil change.
��Ԫ��ǿͨ������������Ԫ�Ƽ۵�ʯ�͵ȴ�����Ʒ�ļ۸��µ�����Ϊ�Գ����������ҵ�Ͷ������˵ʯ�ͱ���ˡ�
4. Keep a Dollar or Give a Dollar?
����һ��Ԫ���Ǹ���һ��Ԫ��
5. Every extra dollar they have to spend because of high gas prices is one less dollar they can use to put food on the table. We'd , pay the round on matter mortgagees. rent or meet their mortgages.
����Ϊ���ͼ۶�֧����ÿһ��Ԫ�����Ǵ����ǵ���ʳ�ѡ������֧����Ѻ�����Ǯ�п۳������ġ�

��������

percent volume to volume
�ݻ��ٷֱ�;
percent volume volume
���壺���������ٷ���;
volume volume concentration
���壺�����Ũ��;
volume by volume concentration
�����Ũ��;
sound volume indicator volume indicator
����ָʾ��;