055 Categories, factors 范畴, 因素 (fànchóu, yīnsù)

field of view
tunnel

7 视野 [視-] shìyě (view-field) field of view: 开阔 ~ too widen one’s (field of) vision || ~宽/狭窄wide/tunnel vision '
69 隧道 [-] suìdào (tunnel-path) tunnel: 地下~ underground tunnels || 海 底~ the undersea tunnel || 两条~ two tunnels '

---