Pack animal
n. 畜（如马、骆驼等）
🧩 词语组成解析
pack
[pæk]
n. 一群;包裹;（纸牌的）一副;一组;
vt.& vi. （把…）打包;塞进;拥进;（使）聚集成团;
vt. 挑选;压紧;携带;拧紧;
vi. 包装;紧挤在一起;便于折叠收藏的;匆忙离去（有时与 off 连用）;
🗣️ 情景例句
She has the ability to speak English fluently.
她能够流利地说英语。
It is one thing to speak much and another to speak pertinently.
话讲得多是一回事，讲得恰当是另一回事。
We have got quite used to them.
对这些，我们已经司空见惯了。