用法:
1 (of sounds) throbbing loudly; reverberating （指声音）震荡的, 回响的.

用法:
2 (of sounds) expressing sadness; mournful （指声音）凄切的, 悲戚的.

• implication
• imply
• import
• importance
• impose
• impossible
• impress
• impression
• impressive
• imprison
• improve
• improvement
• in
• inaugurate
• inbabit
• incident
• incline
• include
• income
• increase
• increasingly
• incredible
• independence
• independent
• index