An awkward or troubling interaction may occur when an introduction is made too soon in a relationship or if it comes as a surprise to your children that you've been dating someone new.
当你过早把约会对象介绍给孩子，或者被孩子意外地发现你正和新对象约会时，尴尬的、麻烦的情境将会出现。
He starts at their beginning with a weighty introduction that looks at fossils dating back to the dinosaurs, the structure of feathers and the evolution of birds.
通过大量介绍恐龙时代的化石，他开始描述最初的羽毛结构和鸟类进化的开端。
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