It should be black, or the color of field of study, unless it is for a doctor's degree in which case is may be gold.
流苏应为黑色或者是该学科的颜色，而博士学位的流苏可以是金黄色的。
He has chosen, on the contrary, the black iron fence or the potter's field.
相反的，他已经选择了与黑黑的铁栅栏或忙忙碌碌的田野为伴。
The electrons respond to black-body radiation, a subtle heat field that permeates space.
电子对黑体辐射的回应，产生一种微小渗透到空间的热场。
The sun warmed the black earth of the farmer's field.
太阳把农夫田里的黑土晒暖了。
The sun warmed the black earth of the farmer's field.
太阳把农夫田里的黑土晒暖了。
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