seal in中文什么意思

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Herewith we are sending you a written contract under seal in two copies .
茲寄上蓋有印章的契約一式兩份。
A glass or quartz tube has tungsten electrodes sealed in each end .
兩根鎢絲電極是封在玻璃管或石英管的兩端。
His lips devoid of their ferocious sneer, were sealed in an expression of unspeakable sadness .
他的嘴唇失去了那兇惡的譏嘲神情，卻被一種難以名狀的悲哀的表情封住了。
The effectiveness of pressure seals in the subsurface may be evaluated by making a calculated fluidpressure profile of the overlying shales .
在地下，壓力封閉的有效性可以通過(guò)計(jì)算上層頁(yè)巖的流體壓力剖面來(lái)估計(jì)。
The chinese and korean peoples have sealed in blood a great and extremely close friendship in the course of common struggle for half a century .
在半個(gè)世紀(jì)里，中朝兩國(guó)人民在共同戰(zhàn)斗中用鮮血凝成了最親密的偉大友誼。