边材含有木质导管, 但不如中心木质那样坚硬.Sapwood contains xylem vessels, but not as strong as heartwood.毛白杨边材材色株间存在显著差异.Thecolor of sapwood of Chinese white poplar among trees has significant difference.边材色稍浅,仅导管槽带有红色.Sapwood pale colored ...
一九八零年,百分之十七的官方发展援助用在了农业上.In ninteen eighty , seventeen percent of official development assistance went to agriculture.有百分之九十七的女性认为,在 长期 的伴侣关系当中,对彼此忠实这一点很重要.Ninety - seven percent thought being faithful in a long - term r...
...the cloistered world of royalty.皇室与世隔绝的生活She cloistered herself in the office.她呆在办公室里好像与世隔绝一样.the cloistered world of the university与世隔绝的大学Nash did not live a cloistered existence nor was he spared the shocks that fle...