Focuser
聚焦放大镜, 聚焦装置
🗣️ 情景例句
Due to lack of funds
由于缺乏经费
In secondary school, children get more advanced knowledge.
在中学，孩子们得到更高深的知识。
Even though the road was littered with boulders and pitted with holes, Bruce was not in the least perturbed.
尽管路面布满石头，坑坑洼洼，但布鲁斯却一点儿不慌乱。