观察研究 meaning in English

observational research
observational study

Observation and research on classroom teaching communication
课堂教学交往的观察研究
Study on introducted pfaffia ' s biological charactersistic
引种珐菲亚生物学特性的观察研究
Study on growth regularity of lin ai
临矮534小麦品种生育规律观察研究
Research on the chew quantity of the dendroctonus valens le conte
红脂大小蠹取食量的观察研究
Observational study on the extra - floral nectary of cherry and peach
樱桃和桃花外蜜腺的观察研究

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