贫困、文盲与高出生率密切相关。Poverty and illiteracy go together with high birth rates.由于出生率下降，产科服务会随之削减。Maternity services were to be reduced in consequence of falling birth rates.有几个因素已被援引来说明出生率降低的原因。Several factors have been adduced...
Lina is fine and sends you her love and best wishes.莉娜身体很好，还让我转达她对你的爱和祝福。I hate to trouble you, but Aunt Lina's birthday is coming up and I would like to buy something nice for her.我真不愿打扰您，但莉娜阿姨的生日就要到了，我想给她买点好东西。Sis...
Plains, plateaus, and mountain ranges are major landforms.平原 、 高原和山脉都是主要的地形.Landforms of topography, vegetation and climate are influential factors in formation of soils.地形或地形学 、 植被和气候都是对土壤形成有影响的因素.Water and soil loss is...