Objective To investigate how much the seamen on the Chang jiang river know about AIDS and to evaluate the effectiveness after AIDS and hea lth instruction.是什么意思_Objective To investigate how much the seamen on the Chang jiang river know about AIDS and to evaluate the effectiveness after AIDS and hea lth instruction.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句