书籍 Insight - 基础 - 单元 4 - 4D

happening, located, or used outside a house, building, etc.

something that a person spends time doing, particularly to accomplish a certain purpose

活动,行为

a large rock, usually one that has been shaped by natural forces such as water or ice

巨石,大石头

an activity in which someone jumps from a very high place with a rubber cord tied around their ankles

to explore natural underground chambers and tunnels

to jump into water, usually hands and head first

a sport that involves riders performing specific tasks like jumping over obstacles or showcasing their skills on horseback

the activity or sport of riding a mountain bike over rough ground

a type of sport in which a person climbs rock surfaces that are very steep

a winter sport or activity in which the participant stands on a board and glides over snow, typically on a mountainside

the sport or activity of riding a surfboard to move on waves

an activity that involves rolling downhill inside a transparent plastic ball