xylem tissue造句

例句与造句

1. the annual rings of plants growing in temperate climates can be seen in crosssection as two consecutive rings of light and dark-colored xylem tissue
   在有显著季节性气候的地区中，不少植物的次生木质部在正常情况下，每年形成一轮（色浅层和色深层）。
2. It's difficult to find xylem tissue in a sentence. 用xylem tissue造句挺难的