n. (花草的)茎;词干;(高脚酒杯的)脚;烟斗柄
vt. 遏制[阻止](液体的流动等);阻止;封堵;遏止
网络 阀杆; 词干; 茎干
Stem cell research is supported by many doctors.
干细胞研究得到很多医生的支持。
The plant´s stem is marked with thin green longitudinal stripes.
这种植物的茎上长有绿色细长条纹。
´Writ´ is the stem of the forms ´writes´, ´writing´ and ´written´.
writ是writes、writing和written三个词的词干。
The main stem will extend to around 12 ft, if left to develop naturally.
如果让其自然生长,主干会延伸到12英尺左右。
He stooped down, cut the stem for her with his knife and handed her the flower.
他弯下腰,用刀替她割下花茎,然后把花递给她。