The process of integration has the nature of arduousness and protractiveness.一体化进程有其艰巨性和长期性.But we must see complexity and arduousness of this process.但必须看到这一过程的复杂性和艰巨性....
船因逆潮而慢下来.The ship was slowed down by counter tides.鱼又慢下来了,正用它惯常的速度游着.The fish had slowed again and was going at his usual pace.它们的进化速度看来确实是慢下来了.Their evolutionary rate does seem to have slowed down....