Because of him, Arbor Day was set up in Nebraska.因着他的努力, 内布达斯卡州设立了植树节.You may have heard of Arbor Day at school.你可能在学校里听过植树节.Later on, each American state started to celebrate Arbor Day.后来, 其它州也跟进,开始庆祝植树节....
'The anchorage is on the south, behind an islet, I fancy?'“ 我想锚地大概是在南面那个小岛的后面 吧 ?”It completes its journey in the vast expanse of the Thousand - Islet Lake.尽头处,有浩瀚的“千岛湖”.You can find whole regiments of birds on...
Physiological and biochemical effects of Hg ~ ( 2 + ) of Egeria najas were tested.研究了不同浓度Hg2+对细叶蜈蚣草(Egerianajas)叶绿素(Chl ) 、超氧化物歧化酶(SOD)和过氧氢酶(CAT) 的分子毒理学效应....