n. 河段；流域；（上、中或下）游; （外）围；（远）处; （组织或机构中的）层级

n the limits within which something can be effective

n an area in which something acts or operates or has power or control: "the range of a supersonic jet"

n the act of physically reaching or thrusting out

n the limit of capability

v reach a destination, either real or abstract

v reach a point in time, or a certain state or level

v move forward or upward in order to touch; also in a metaphorical sense

v be in or establish communication with

v to gain with effort

v to extend as far as

v reach a goal, e.g., "make the first team"

v place into the hands or custody of

v to exert much effort or energy