Astronomers tacitly assume that stars of the same luminosity and color all have the same mass.天文学家心照不宣地默认,光度和颜色都相同的恒星具有相同的质量.People assume the two blonds are related, so they let that assumption stand.人们假设这两个金发碧眼的人有亲戚关系,...
A severe infection may cause the appendix to rupture.严重的感染可能导致阑尾穿孔.We are not certain whether the appendix had already burst or not...我们不敢肯定阑尾是否已经破裂。Appendix II of this chapter reproduces the form used in Sweden.本章附录Ⅱ转载了...