preliminary investigation

• 初步调查

preliminary investigation的用法和样例：

例句

1. Two geologists will make a preliminary investigation.
   有两位地质学家将做一次初步调查。
2. We've reported some of the preliminary findings in the study.
   我们已经把一些初步调查结果写进调研报告了。
3. Preliminary study on moisture metabolism of Silphium perfoliatum L.
   串叶松香草水分代谢初步研究。
4. A Preliminary Study on Callus Inducement from the Anther of Jartopha curcas L.
   麻疯树花药愈伤组织诱导的初步研究。