[kěn]
[动]
(一点一点儿地往下咬) bite; gnaw; nibble
									
										nibble at an ear of corn
										啃老玉米
									
									
									
										bite meat off the bone; gnaw the meat off a bone
										把骨头上的肉啃下来
									
									
									
										A rat can gnaw a hole through wood.
										老鼠能啃穿木头。
									
									
									
										He was nibbling on the apple.
										他在啃苹果。
									
									(徒劳无益的钻研) take great pains with one's studies
									
										delve into books; read with great difficulty but with little understanding; make laborious efforts to read
										啃书本