explains
v.
讲解，解释( explain的第三人称单数 );
说明…的原因，辩解;
说明，解释，辩解;
例句:
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Seems to refer to other women, she explains.
来自BBC
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Somewhat ingenuously, he explains how the crime may be accomplished.
他有点天真地解释了这一罪行可能是如何实施的。
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It's a background that perhaps explains her style.
来自BBC
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The video explains in simple terms how the new tax works.
录像用简单易懂的语言解释了新税法。
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He explains that there was an explosion of courses through the 1960s.
他解释说20世纪60年代课程迅速增多。
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It simply explains how it has developed and speciated.
来自SA