青云翻译

These young scientists through on-site observation, obtained first-hand information needed for research

These young scientists through field observation, access to the research work required for first-hand information

These young scientists through the spot inspection, have obtained the first material which the research work needs

Through on-site observation, these young scientists access to the research work of first-hand information required for

These young scientists through field observation, access to the research work required for first-hand information