It led the world in computer and material science technology, and it jealously hoarded its leadership with military secrecy and export controls.
它在计算机和材料科学技术领域走在全球的前列，通过军事机密和出口控制小心地保持着自己的领导地位。
It led the world in computer and material science technology, and it jealously hoarded its leadership with military secrecy and export controls.
它在计算机和材料科学技术领域走在全球的前列，通过军事机密和出口控制小心地保持着自己的领导地位。
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