1. Poor old aunt Mary doddered down the street.
   可怜又年迈的玛莉婶婶蹒跚地走在街上。
2. He doddered down the street.
   他踉踉跄跄沿街走去.
3. The dodder is one kind of annual autoecious weed of alfalfa, cosmopolitan weed quarantine object.
   摘要菟丝子是苜蓿田中最常见的一年生寄生性恶性杂草，是世界性的杂草检疫对象。
4. In this paper,the methods of producing sodium diacetate have been described.It is widely used as high effective preservative in grains,dodders,foods and so on.
   论述了双醋酸钠的制备方法及其在防腐、保鲜、洗涤等领域的应用。

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