And, the special case is if this coefficient of t turns out to be zero in the end, and that's actually going to happen, exactly when the line is either parallel or in the plane.
特殊情况下，如果最后t的系数恰好是0的话，实际上这是会发生的，当直线平行于或处于平面上。
He gives the phone to the teller, a guy on the other end of the line says, we "ve got this guy" s little girl, if you don "t give him all your money, we" re gonna kill her.
他把手机给出纳员，电话另一头的家伙说，我们已经抓住了这个家伙的女儿，如果你不把所有的钱给他，我们就要杀死她。
He gives the phone to the teller, a guy on the other end of the line says, we "ve got this guy" s little girl, if you don "t give him all your money, we" re gonna kill her.
他把手机给出纳员，电话另一头的家伙说，我们已经抓住了这个家伙的女儿，如果你不把所有的钱给他，我们就要杀死她。
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