During the planning phase, I let them climb a ladder to the mark on the trunk where the floor would go.

在整个规划设计阶段，我让他们爬上梯子在树干上标记下将要架设树屋地板的地方。

youdao

Mark reached his long trunk under the couch to get it and let out a huge sneeze.

马克伸出长象鼻到沙发底下捡，却打了个大喷嚏。

youdao

Remember when I was a child, my yard with a tree and I was born with a knife, I often citrus in the trunk, engraved a mark to measure whether oneself grow everyday.

记得小时侯，我家院子里种着一棵和我出生时一起种的桔树，我经常拿小刀在树干上刻了个记号，天天去测量自己是否长高。

youdao

Happy used her reflection to repeatedly touch the white mark with her trunk, which showed that she, at least, recognised her own reflection.

ECONOMIST: Self-recognition