In January, he took an indefinite medical leave "so I can focus on my health" — his second leave from the company in the past two years.
在今年一月，他获得不确定时间的假期，这是他在过去两年之内第二次离开公司了，他说：“只有离开公司，我才能将精力集中在我的健康上”。
We use the present perfect tense to talk about something that happened at an indefinite time in the past.
我们使用现在完成时谈论发生在过去某个不确定的时间的事情。
Probable events result from the past deal and events in enterprise, which shares indefinite and uncontrollable results, and can be confirmed by the future events or unhappening events.
或有事项是企业过去的交易或事项引发的，其结果具有不确定性和不能控制性，只能由未来发生或不发生的事项予以证实。
The Xijir Ulan tectonic melange belt is the western part of Xijr Ulan-Jinshajiang sutural zone, because study in low degree in the past, it is still indefinite.
西金乌兰构造混杂岩带为西金乌兰-金沙江缝合带的西端，由于以往研究程度低而认识较为模糊。
The Xijir Ulan tectonic melange belt is the western part of Xijr Ulan-Jinshajiang sutural zone, because study in low degree in the past, it is still indefinite.
西金乌兰构造混杂岩带为西金乌兰-金沙江缝合带的西端，由于以往研究程度低而认识较为模糊。
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