- 重点词汇
- 交换
exchange; change; swap; switch; trade; interchange; barter; reversal; commutative
- 空间
space; room; area; volume; airspace; headroom; void; enclosure; blank; leeway; elbow room; gap; place; berth; capacity; scope; territory; zone; spatial; space-related
- 废品
waste; scrap; reject; crapola; spoilage; waste product
- 利用
use; utilize; exploit; take advantage of; harness; employ; leverage