в то же время

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Certain problems not directly connected with ancient objects and yet important to the archaeologist, ...

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The alloy has high strength for rough service, yet has sufficient machinability ...

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It was difficult to imagine a kind of water that would rigidly exclude ions such as potassium while (or at the same time) readily dissolving glucose and ethyl alcohol.

* * *

В то же время -- at the same time, simultaneously (одновременно); while, while still, at the same time (вместе с тем); yet (хотя и, но)

 It is seen that the position of the reattachment zone moves downstream with increasing blockage and, at the same time, the zone becomes wider.

 Simultaneously, the generated centrifugal forces were supported by a cylindrical outer ring track.

 This simplifies the mechanical arrangement, reducing part count while improving the overall system reliability.

 The stop spacer limits outward movement of the waterbox to a predetermined amount while still permitting the free action of the shell expansion joint.

 The present work is intended to cover large Grashof number flows, yet below the onset of turbulence.