利用词项依存关系来改进词袋模型，一直是文本检索中一个热门话题。
To relax the term independence assumption, term dependency is introduced and it has improved retrieval precision dramatically.
在美国和加拿大，人们说垃圾袋或垃圾桶时通常用“garbage bags”和“ garbage cans ”，而在英国，这两个词就变成了“ dustbins ”和“ dustbin liners ”。
In the United States and Canada it's pretty common to hear people refer to "garbage bags" and "garbage cans" but in the UK it's "dustbins" and "dustbin liners."
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