在热闹广场的另一边，摊贩叫卖着热狗和羊角三明治。Across the busy plaza, vendors sell hot dogs and croissant sandwiches.该渔港通常都是一派热闹繁忙的景象，很有地方色彩。The fishing boat harbour was usually bustling with lots of local colour.那里气氛安宁而不热闹。Its atmosphere is o...
最高阶导数线性地出现的那种方程是准线性方程.A quasilinear equation is one in which the highest - order derivative appears linearly.这种 “ 导数边界条件 ” 的规定描述于 3-5 节中.The specification of such " derivative boundary conditions " is described in Sectio...
他送给女友一枚镶着蓝宝石的订婚戒指。He gave his girlfriend a sapphire engagement ring.现在让我们考虑象钻石和蓝宝石这样的晶体.Now let us consider crystals such as diamond or sapphire.现在让我们考虑象金刚石和蓝宝石这样的晶体.Now let us consider crystals such as diamond or sopphi...