Then A is positive semidefinite, negative definite and negative semidefinite.
一封好的商业书信应该是明确的、直截了当的。
Because he is so tall, sometimes if he looks less impressive in one situation, people make a definite negative judgement.
因为他太高了，有的时候，如果他在某种情形下看起来不大令人印象深刻，人们就会做出一定的负面评价。
If you want to effectively deal with negative people and be a champion of positivity, then your best route is to take definite action through some of the steps below.
如果你想有效对付那些负能量的人，成为正能量的拥护者，最好的办法就是采取下面的这些措施。
Perhaps this trend of singlehood will have a definite negative impact on society!
可是单身的趋势也必然会给社会带来一定的负面影响啊！
Numerical examples show that the negative semi-definite matrix condition of exponential stability and the controller design method are feasible.
数值算例说明指数稳定的半负定矩阵条件和控制器设计方法是可行的。
There was definite relationship between the evolvement of helicity's negative value at higher…
高层螺旋度负值的演变与沙尘暴的出现有一定的对应关系。
In 4 of 5 ovarian cancer cells, the expression of MDM2 was positive and the IC50also reached a high value. IC 50 value of P53 had no definite trend in expression positive and negative cells.
在MDM2表达阳性的5个卵巢癌细胞株，其中4株ic _(50)显示为高值，P53表达阳性与阴性的卵巢癌细胞中ic _(50)值无明显变化规律。
In 4 of 5 ovarian cancer cells, the expression of MDM2 was positive and the IC50also reached a high value. IC 50 value of P53 had no definite trend in expression positive and negative cells.
在MDM2表达阳性的5个卵巢癌细胞株，其中4株ic _(50)显示为高值，P53表达阳性与阴性的卵巢癌细胞中ic _(50)值无明显变化规律。
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