单词：packings
[化] 填充物; 填料; 填充; 装柱; 装色谱柱; 垫革; 紧束; 敛集; 堆积
n. the enclosure of something in a package or box
n. carrying something in a pack on the back
packings的用法和样例：
例句
- Gel-permeation columns based upon soft gels still can be problematic, but you shouldn't worry when using silica-based packings.凝胶渗透柱子基于软硅胶，所以仍然是个问题，不过你使用硅胶基的填料就不必担心。
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