他们计划四月下旬出发并在中国停留一个星期左右。
They plan to leave in the second half of April and stay in China about a week.
选举定于四月下旬开始。
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!
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