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1·Alone with definite time.

单独确定的时间。

2·I want an appointment for a definite time and place.

我要一个有确定的时间和地点的约会。

3·Therefore, the use of furnace lining has definite time limit.

所以炉衬的使用是有一定的期限的。

4·Objective To discuss the need of cuff deflation in definite time for artificial airway.

目的探讨人工气道气囊是否需定时放气。

5·We use the simple past tense to talk about what happened at a definite time in the past.

我们用一般过去时来谈论过去的某一事件发生的事情。

6·It is important to maintain a normal work life balance. Set a definite time frame for work.

维持正常的工作和生活的平衡非常重要，为工作设定一个时间范围。

7·Since the 1920s, scientists have known the universe is expanding, which means it must have started at a definite time in the past.

自20世纪20年代以来，科学家已经了解到宇宙正在澎张。这就是说宇宙一定是在过去的某一特定时候开始形成的。

8·After anaerobic cultivation for a definite time, a certain quantity of sludge suspension was used for oxidation titration experiment.

经过一定时间培养后，取一定量的污泥悬液进行氧化滴定实验。

9·Increases in average temperature and rainfall were associated in Zanzibar with higher Numbers of cholera cases within a definite time period.

一段时期内的平均温度和降雨量与桑给巴尔群岛的霍乱病例数存在紧密联系。

10·Then the suspension of pl was mixed with HA solution and the complex was obtained after stirring under a constant temperature for a definite time.

即首先利用薄膜分散超声破碎法制备pl水分散液，然后与HA的水溶液混合，恒定温度搅拌一定时间得到复合物。