戈尔巴乔夫没能使苏联各组成部分保持在一起。
Gorbachev failed to keep the component parts of the Soviet Union together.
真正的上皮组织仅存在于通过称为紧密连接的咬合带而保持在一起的单层细胞中。
A true epithelial tissue is present only in a single layer of cells held together via occluding junctions called tight junctions.
保持在一起进步。
The first is this the z effective, or how much charge is actually in the nucleus that's felt, Z or the I guess we would say the z, how much the charge is on the nucleus that holds it close together.
第一个是有效核电量,或者说实际感受到的核电荷量,又或者我想我可以说就是,使它们保持在一起的,原子核的电荷量。
And we know that it's electron density between the nuclei that holds two atoms together in a bond.
我们知道是两个原子核之间的,电子密度保持两个原子在一起成键的。
That cells that form tissues often have junctions that hold them together so that they don't fall apart and they exist as a solid piece of tissue.
组织细胞通常通过,细胞连接而联系在一起,所以它们不会分散开来,而保持坚固的组织形态
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