It begins with Maarten Schmidt who hypothesized that star formation rate (SFR) was related to the surface density of atomic hydrogen gas in the cloud.
最早是Maarten Schmidt猜测恒星形成率(SFR)与云层中氢原子气体密度有关。
By considering the effects of gas velocity and particle circulating rate on the surface abrasion rate, an empirical equation is proposed.
实验结果揭示了气体流速和固体颗粒循环速率两个操作条件对磨损速率的影响规律。
The vaporous cryogen creates a reinforcing vapor that slows the expansion rate of the expanding gas, localizing the expanding gas over the metal surface.
蒸气制冷剂产生减缓膨胀气体的膨胀速率的补强蒸气，从而将膨胀气体留存在金属表面上。
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