Concentrations
n. 集中( concentration的复数形式 ); 专心; 关注; 浓度
🗣️ 情景例句
It is.
正是。
So if anyone here is interested in computer and computer software, please let me know.
所以这里如果有人对电脑和电脑软件感兴趣，请告诉我。
If they knew how difficult it was to drill through the hard rock, they would lose heart.
如果他们知道了钻透那坚硬的岩石有多么困难，他们会丧失信心的。