Gilt vaccinations should be performed during this development phase. 在豬的生長(cháng)發(fā)育時(shí)期打好疫苗。
The growth and development of Cymbidium sinense in vitro were observed under scanning electron microscopy. 摘要用石蠟切片和掃描電鏡對墨蘭試管苗植株的生長(cháng)發(fā)育進(jìn)行了研究。