1. Improve experiment device and experiment method and make experiment concentrated green and miniature. �Ľ�ʵ��װ�ú�ʵ�鷽����ʹʵ���Ч����ɫ���ͻ���
2. These cocktails are either made from reagents or purchased in concentrated form and diluted with toluene. ��Щ���Һ�������Լ����ƵĻ����������üױ�ϡ�͵�Ũ������
3. Ample oil reserves are still being discovered the world over, but they happen to be concentrated increasingly in the Middle East. ����������ڲ��Ϸ��ַḻ��ʯ�ʹ�������ʯ�ʹ���������Խ��Խ�������ж�������
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adj.
1. gathered together or made less diffuse
2. of or relating to a solution whose dilution has been reduced
3. intensely focused
4. (of light) transmitted directly from a pointed light source
5. being the most concentrated solution possible at a given temperature; unable to dissolve still more