The star that exploded that year was just on the edge of the theoretical mass limit for forming black holes, about 20 times the mass of the sun.

爆炸的恒星其质量接近形成黑洞的理论质量极限，即太阳质量的20倍左右。

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With in-source collision induced dissociation (CID) and exact mass measurement, the differences between the calculated mass and the theoretical mass of all compounds and fragments were less than 2.

对经过液相色谱分离后的化合物进行源内碰撞诱导裂解(CID)，并对化合物及其碎片离子进行精确质量测定，测定质量与理论质量之间误差不超过2。

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The next one, unless everyone’s theories are wrong, will be the Higgs boson, a theoretical construct required to give mass to the other particles of which matter is composed.

除非现有的粒子物理理论是错误的，下一个待发现的将是希格斯波色子(Higgs boson)，它的理论作用是把质量赋给其他物质组成粒子。

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In the 1960s, a small number of theorists plugged that gap by dreaming up Higgs, which provides a theoretical explanation for how some particles could attain mass.

WSJ: New Particle Found, Consistent With Higgs Boson

"When you have such a big mass in such a small space you have extremely high gravity, " said Charles Wang, a theoretical physicist at the University of Aberdeen, Scotland, who wasn't involved in the study.

WSJ: Einstein Proved Right on Gravity��Again

Since the 1930s, the mass of research evidence points to the existence of several factors common to all forms of therapy despite theoretical orientation (dynamic, cognitive, etc.), mode (individual, group, couples, family, etc.), dosage (frequency and number of sessions), or specialty (problem type, professional discipline, etc.).

FORBES: There Are No Silver-Bullets in Education Reform