🧩 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
We were all sorry when we heard that your brother had had an accident.
我对你弟弟的意外感到遗憾。
Archeologists still can only surmise as to the origin of Man.
考古学家们对于人类的起源依然无法推测。
He was not a bit tired.
他一点也不累。