用法:
1 (of sounds) shrill; high in pitch3(3a) （指声音）尖锐的, 声调高的:
a ,high-pitched `whine 尖声的哀叫.

用法:
2 (of roofs) steeply sloping （指屋顶）坡度大的, 陡的.

• re-lay
• relay 1
• release 1
• relegate
• relegation
• relent
• relentless
• relentlessly
• relentlessness
• relevance
• relevant
• reliability
• reliable
• reliably
• reliance
• reliant
• relic
• relief 1
• relief map
• relief road
• relieve
• relieved
• religion
• religious
• religiously