教师必须不断更新他们的知识，以保持他们的专业能力。

Teachers have to constantly update their knowledge in order to maintain their professional competence.

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即使是传统的厨师也会意识到，要在保持他们的菜肴的英国特色的同时适应当地的口味和习俗。

Even the traditional chefs are aware of the need to adapt to local tastes and customs, while maintaining the Britishness of their cuisine.

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同时，他们必须花足够的时间在不同的兴趣以及它们各自的主人身上，以保持发展他们各自的个性，保持他们的关系新鲜。

At the same time, they must spend enough time on separate interests with separate people to preserve and develop their separate personalities and keep their relationship fresh.

youdao

Now,what about those Episcopalians? As one of my friends says, "Those whiskey-palians." They decided to be in the middle.

那些圣公会呢？就像我一个朋友所说的，那些威士忌佩利安，他们决定保持中立。

耶鲁公开课 - 新约课程节选

Even if these people didn't stay in the second room, they didn't stay dead, they had some experience of being dead.

即使这些人没在第二个房间待过,他们没有保持死亡状态,但是他们多少有些死亡的体验

耶鲁公开课 - 死亡课程节选

In order to keep the currency convertible they had to keep interest rates high to prevent people from demanding the gold.

为了保持货币的转换性,他们不得不将利率提高,以防人们向他们索求金子的兑换。

耶鲁公开课 - 金融市场课程节选