Are they learning fast enough and broadly enough, in terms of engineering and technology like fluid dynamics, electronics, stealth to be able to keep up with the state of the art?
他们在流体力学，电子，隐身技术工程方面的研究速度及广度足不足以有能力赶上世界水平？
It is possible that cleaning the lens regularly could reduce this problem, but it is unclear what effect lens-cleaning fluid would have on its built-in electronics.
定期清洗镜片或许能减少这样的问题产生。不过，镜片清洗液会对内嵌的电子设备造成什么影响还不好说。
Magnetic fluid was widely used in the aerospace, electronics, chemicals, machinery, energy, metallurgy, environmental protection, bio-medical and other fields.
磁流体获得了各界的高度重视广泛的应用在航空航天、电子、化工、机械、能源、冶金、环保和生物医疗等各个领域。
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