Levels of pollution present in the atmosphere are increasing. 大气中的污染程度正在加深。 Analysis showed that traces of arsenic were present in the body.

at present, present rate, present policy, wedding present, present generation v.+n. present problem , present evidence , present report , present picture , present challenge

at present, present rate, present policy, wedding present, present generation v.+n. present problem , present evidence , present report , present picture , present challenge

必应词典为您提供Presence的释义，美[ˈprezəns]，英[ˈprez(ə)ns]，n. 存在；出现；在场；出席； 网络释义： 到场；临在；

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现态与次态：过去的输入用触发器的内部状态来表示，称为现态 (present state);当前输入之后转变后的状态称谓次态(next state)。

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必应词典为您提供pattern的释义，美[ˈpætərn]，英[ˈpætə(r)n]，n. 模式；方式；图案；模型； v. 构成图案（或花样）；促成（某行为模式）； 网络释义： 样式；式样；图形；

必应词典为您提供Phase的释义，美[feɪz]，英[feɪz]，n. 阶段；时期；月相；（月亮的）盈亏； v. 分阶段进行；逐步做； 网络释义： 相位；状态；相数；

必应词典为您提供participate的释义，美[pɑː(r)ˈtisiˌpeɪt]，英[pɑː(r)ˈtɪsɪpeɪt]，v. 参与；参加； 网络释义： 分享；分担；参与项目；