[yī dìng]
(规定的, 确定的) fixed; established; regular
									
										established rules and regulations
										一定的规章制度
									
									
									
										fixed production quota
										一定的生产指标
									
									
									
										work according to specifications
										按照一定的规格进行生产
									
									
									
										There are fixed times for study and for work.
										学习、 工作都有一定的时间。
									
									
									
										Every sort of spring has a definite elasticity.
										每一种弹簧都有一定的弹性。
									
									
									
										This must be the book he wants to buy.
										这一定是他想买的书。
									
									
									
										Provided we do all this, we shall assuredly succeed in our reform.
										只要我们做到这一切, 改革就一定能成功。
									
									
									
										I shall definitely be home before six o'clock.
										6点以前, 我一定回家。
									
									
									
										to a certain degree
										在一定程度上
									
									
									
										under given conditions
										在一定条件下
									
									
									
										in a certain sense
										在一定意义上
									
									
									
										within a certain [definite] period
										在一定的时期内
									
									
									
										Metals will melt when heated to a certain temperature.
										金属加热到一定的温度都会熔化。
									
									
									
										reach a fairly high level
										达到一定水平
									
									
									
										attach due importance to
										给予一定的重视