In modern English the syntactic behavior of auxiliary verbs differs from that of main verbs in that only auxiliary verbs can be fronted in interrogative sentences.
在现代英语中，助动词和主要动词的句法表现的主要区别在于，只有助动词在疑问句中能被提前。
They allow you to concisely define behavior that has wide-ranging impact with very little syntactic hangover in the target class.
您可以通过它们精确地定义有较广影响而在目标类中有较少语法残留的行为。
Moreover, based on the method of finite element analysis and the general software, the failure behavior of high density syntactic foams is investigated.
还利用计算机和通用软件对高密度复合泡沫塑料进行了有限元分析，研究了高密度复合泡沫塑料的失效行为。
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