Seitz说，这样的“微气泡”实事上就是“由气体组成的镜子”，用一些设备将增压的水和压缩空气混合放入涡流的喷气机中，在船外产生这些气泡。
Such "microbubbles" are essentially "mirrors made of air," says Seitz, and they might be created off boats by using devices that mix water supercharged with compressed air into swirling jets of water.
着重考虑了作为气体微流量标准装置核心的恒压式气体微流量计的原理、结构、下限因素和不确定度等基本问题。
The principle, structure, measurement limit and analyze of uncertainty of the constant pressure gas flowmeter, which was the key component of gas flow standard apparatus, were considered emphatically.
一旦充满气体的微气泡发现癌细胞并粘附到他们的血管壁上，他们就会发出强烈信号，该信号可通过标准的临床超声扫描仪捕获到。
Once the gas-filled microbubbles seek out the cancers and attach to their vessel walls, they send out strong signals that are picked up by standard clinical ultrasound scanners.
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