“专业的”用英语怎么说？

他的论文几乎可以经受住最专业的审查。His papers were proof against all but the most expert of scrutinies.多数员工都掌握专业的儿童保育知识。Most of the staff specialise in the care of children.他1934年获得了化学专业的理学士学位。He completed his BSc in chemistry in 1934....