So if burning forests didn't create the K-T boundary soot, what did?
K-T分界线灰烬的不是燃烧的森林，那又是什么呢？
Then, in 1991, researchers discovered a 120-mile-wide, 1.5-mile-deep crater called Chicxulub in Mexico of the same age as the K-T boundary.
随后，在1991年，研究人员在墨西哥发现了与K-T界限在同年代的一个直径120英里宽，1.5英里深的陨石坑，被称为Chicxulub。
The Re Os isotope composition is obviously different from the rocks of the continental crust, but similar to the K T boundary sediment, and close to the meteorite.
铁锰结壳的铼-锇同位素组成明显有别于大陆地壳岩石，和K- T界线沉积物相似，接近陨石值。
Keller stressed these findings do not deny that an impact occurred around the K-T boundary, and noted that one or possibly several impacts may have had a hand in the mass extinction.
凯勒强调，这些调查结果并不否认，影响发生周围K - T边界，并指出，其中一个或几个可能的影响都有可能在大量物种灭绝中起作用。
A parabolic system with nonlinear boundary conditions is considered. T he existence and uniqueness of a nonnegative classical solution are proved to this problem.
考虑了一个具有非线性边界条件的抛物系统，证明了这个问题非负古典解的存在唯一性。
According to the principle of minimum potential energy, the governing differential equations and boundary conditions are established for T-beams with wide flanges under vertical bending.
根据最小势能原理，建立宽翼缘t梁竖向弯曲的控制微分方程及边界条件。
Under the spherical coordinate, the boundary value method using the along track estimates of(T/P) satellite as open boundary conditions is applied to establish tide models in the Yellow Sea.
利用球坐标系中的二维潮波方程组，以T/P卫星沿迹分析结果为开边界条件的边值法，计算了黄海中的一个四边形区域。
The most prevalent way to calculating T-matrix is the extended boundary condition method (EBCM), which, however, is largely limited to axisymmetric and near-spherical particles.
在计算T矩阵的方法中，最流行的方法称之为扩展边界法（EBCM），但是它很大的程度上只适合轴对称和近似球形的粒子。
The active heating or periodic pulsed heating can be used to excite and cancel the T-S waves and also to control the boundary layers seperation.
以热脉冲加热的主动式加热方式既可用来产生和消除边界层的T-S波，也能用来控制边界层的分离。
The active heating or periodic pulsed heating can be used to excite and cancel the T-S waves and also to control the boundary layers seperation.
以热脉冲加热的主动式加热方式既可用来产生和消除边界层的T-S波，也能用来控制边界层的分离。
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