被子植物开始时是浸沉在液体中的游离合子.Angiosperms begin as free zygotes immersed in a fluid.接合形成的合子是部分二倍体,也叫做部分合子.The zygotes formed in conjugation are partial diploids or merozygotes.不定胚与合子胚之间不能划分出明显的界限.A sharp demarcation of adventive e...
英国许多海滩连最起码的卫生标准都达不倒。Many of Britain's beaches fail to meet minimum standards of cleanliness.许多学生并未做好接受高等教育的充分准备。Many students are not adequately prepared for higher education.许多农民然后就会凶巴巴地把你从他们的土地上撵走。Many farmers wil...