🧩 词语组成解析
risk
[rɪsk]
n. 危险，冒险;保险额;被保险人或物;
vt. 冒…的危险;使…冒风险（或面临危险）;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
infection
[in'fekʃən]
n. <医>传染，感染;传染病，染毒物;影响;
🗣️ 情景例句
Good evening, how may I help you sir?
晚上好，你需要帮助吗？
The master always exacts quality work from his students.
老师常常要求学生们认真踏实的完成功课。
we are now pretty certain the Earth is the only one on which life can survive.
我们目前可以肯定的是，地球是生命能存在的唯一行星。