皮层的内层分化为内皮层.The inner layer of the cortex differentiates into the endodermis.初生根为四原型, 内皮层明显,可见到凯氏带.The primary root is tetrarch , and endodermis with casparian strip is obvious.内皮层未见凯氏带.The Casparian strip is not clear i...
The skeleton consists of differently shaped bones held together by ligaments.人体骨架是由依靠韧带连接的形状相异的骨头构成。He suffered torn ligaments in his knee.他膝关节韧带拉伤了。He must have a major operation on his knee to mend severed ligaments.为了...