同时在四月下旬北极经历了一场不同寻常的降雨，以上种种迹象表面地球的确在变暖。
Meanwhile, the North Pole experienced an unusual rain in late April, which could prove that global warming is real!
实验之中的种种迹象表明一个能够充分发挥免疫系统的抗病毒能力的方法，那就是同时使用两种能够辨认不同种类抗原的疫苗，一为主，一为辅，一种负责刺激免疫系统,使其做好攻击艾滋病病毒的准备;
The experimental evidence suggests that a particularly good way of activating the cell-killing arm of the immune system is to use two vaccines based on different antigens.
今天企业界所提出的种种激励方式，在不同时期、不同企业都有其适用性。
The different incentive models put forward by the practices of the enterprises are suitable in different time and enterprise.
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