Swimming is helpful for bones that are porous and weak.游泳有助于改善骨质疏松和骨骼脆弱。The water slowly drained away, down through the porous soil.水慢慢流走了，渗入了疏松的土壤。He added sand to the soil to make it more porous.他往土里掺沙子以提高渗水性能....
I wrote hundreds of begging letters to charities and businesses.我给慈善团体和商业机构写了几百封求助信。It makes me so sad when I see young people begging or sleeping rough on the streets.我看到年轻人沿街乞讨、露宿街头，心里会非常难过。Emancipatory thought, beggin...
They travelled westwards.他们向西旅行。Economists warn that enormous pressures could build up, forcing people to emigrate westwards.经济学家警告，迫使人们向西部迁移的压力可能会增至很大的程度。They turned westward / westwards after crossing the river.他们过河以后向...
They drew their wagons into a laager and set up camp.他们把马车围成一圈扎起营地。Commissary wagons with torn canvas covers rocked through the ruts.盖着破帆布的军需车摇摇晃晃地在凌乱的车辙中驶着.The wagons were decorated with flowers and pulled by garlanded ...