4个胚珠同时分泌授粉滴,花粉掉落后被授粉滴带进珠孔.Pollination drops were exuded from 4 ovules at one time.开花当天助细胞珠孔端的丝状器中聚集了大量的钙颗粒.Near anthesis, synergids formed filiform apparatus in which abundant calcium precipitates accumulated pollen tube...
偶尔会有病人过于虚弱，必须通过静脉注射进食。Occasionally a patient is so debilitated that he must be fed intravenously.你的狗应该有它自己进食和饮水用的碗。Your dog should have his own bowls for food and water.如果患者进食欠佳，药物会让他们感觉作呕。If the patient is poorly nouris...
他用一块桦木做一只小船.He used a piece of birch to make a small boat.只有杨木和桦木的原木出货高于去年.Only Poplar and Birch log shipments are up for the year.利用均匀设计法优化了微波辅助提取白桦树皮中桦木醇的工艺.The microwave - assisted extraction ( MAE ) of betulin from B...