A lack of
缺乏，缺少
🧩 词语组成解析
lack
[læk]
vt. 缺乏，缺少;需要的东西;
n. 缺乏，不足，没有;缺少的东西;
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];
🗣️ 情景例句
Yes, sir.
是的 ，先生。
It's easy to fall into a trap, but hard to get out again.
堕入陷阱易，脱离陷阱难。
Quick! said Li Lei. Lucy and Wei Hua, go round that corner and stop the traffic.
“快！”李垒说，“露茜和魏华，去那拐弯处拦住车辆”。