Surgeons were hopeful of saving the sight in Sara's left eye.外科医生有信心保住萨拉左眼的视力。They are hopeful of bringing the siege to a peaceful conclusion...他们希望能和平结束这次围困。We are hopeful about the future.我们对未来抱乐观态度。He was hopeful...
原始人用石块和骨头做原始的工具.Primitive man made himself primitive tools from stones and bones.原始人很快就学会了使用工具.Primitive man quickly learned how to manipulate tools.遥远北方的爱斯基摩人是原始人.The Eskimos of the far north are primitive....