他关上门,踏上了1/4英里长的下山路.He closed his door and started the quarter-mile walk down the hill.我挤出人群，踏上了自动扶梯。I pushed through the crowds and on to the escalator.我们很不愿意踏上如此漫长艰辛的回家之路。We were reluctant to start the long trudge home....
Autogamy Self - fertilization in plants.自花授粉:植物中的自体受精现象....border plants.花带里的植物...plants that impoverish the soil quickly.使土壤迅速贫瘠的植物Feed plants and they grow, neglect them and they suffer.人勤地生宝;人懒地长草。Most plants prefer t...