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1·Given all the disadvantages of living in aggregated towns, why did people in the thirteenth century move into these closely packed quarters?

考虑到住在集群式城镇的种种弊端，为什么13世纪的人们会搬到这些拥挤的地方呢？

2·The cells of this substance are closely packed together.

这种物质的细胞聚得很紧密。

3·“There were many species in cages closely packed together,” says Yi.

“许多物种在笼子里紧紧挤在一起”，他说。

4·We were so closely packed in the elevator that I could hardly move.

我们在电梯里紧紧地挤在一起，我几乎不能动弹。

5·The molecules in such liquids are closely packed but loosely arranged.

这种液体中的分子可以形成紧密的排列，但平时处于松散状态。

6·Atomic nuclei containing several closely packed protons exist at all.

包括几个紧密挨在一起的质子的原子核确实存在。

7·The molecules in such liquids are closely packed, but loosely arranged.

这种液体分子紧密地挤压在一起，但是又排列松散。

8·The unit is simple to install and can be used in closely packed units at depths of at least 20m.

该装置安装简单，并且可以在密集使用单位在至少20米深处。

9·The result shows that the membrane is a highly ordered and closely packed with hexagonal pore structure.

结果表明其排列高度有序，呈理想的六方柱形结构。

10·Northeast Jiangxi Province is an important area in China with closely packed Cu (Au) polymetallic metallization.

赣东北地区是我国重要的铜(金)多金属矿化密集区。