Under scanning electronic microscope, four kinds of metal structure may be observed including blackcore phase, white core phase, gray ring phase and white adhesion phase.
在扫描电子显微镜下可观察到四种金相组织：黑色芯相、白色芯相、灰色环形相和白色粘结相。
2
That, for me, sums up the seductive intellectual core of computers and computer programming: here is a magic black box.
这对我来说，构成了有吸引力的计算机和计算机语言的核心：这是一个黑色的魔法盒子。
3
He sits on a chair in a windowless laboratory and cradles a large rock, or core, of jet-black flint in his left hand.