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Result As body position changed from seating or supine into head down tilt, FVC, FEV1, FEV1%, MVV, VA and IVC decreased.The change of MVV was the most prominent (P<0.000). 结果随着体位由坐位、平卧位到头低位，肺通气量（FVC;FEV1;FEV1%25;MVV）、肺容量（VA，IVC）逐渐减少，其中以MVV变化显著（P<0.;000）。
Objective To investigate the change of cardiac function during 21 d head down tilt (HDT) bed rest and the effect of lower body negative pressure(LBNP) in the last week in human. 目的观察21d头低位卧床期间被试者心功能的变化及最后一周下体负压锻炼(LBNP)的影响。
Method The event related potentials (ERPs) during auditory location discrimination were compared between head down tilt (HDT) and head up tilt (HUT) conditions among 14 healthy subjects. 目的探明模拟失重条件下听觉方位区分的脑反应特性,进一步了解模拟失重条件下脑功能的变化特点。
Have a glass of beer to rinse your dinner down. 喝杯啤酒把你吃的晚饭冲下去。
The machine must break down at this busy hour. 正忙的时候，机器偏偏又坏了。
The old man stared the uninvited guest up and down. 老人把不速之客上下打量了一番。
But the lack of an actual carbon price still keeps the cost of existing electricity down, and thus the necessary incentives in place to make Google's cheaper-than-coal equation a reality. 但是，缺乏实际的碳排价格却仍然使现有的电力成本保持低位，因此需要落实必要的鼓励机制，使谷歌的“比煤更便宜”的不等式成为现实。
The Effect of Head Down Tilt on Blood Circulation and Respiratory System 头低位倾斜对血液循环及呼吸系统的影响
He let himself down slowly by means of a tope. 他借助一根绳子慢慢地下来了。
The deer was peppered with shot all down one side. 那只死鹿的半边身子都被子弹击中。
Be he a civil engineer or an electrical engineer? 他是土木工程师还是电气工程师？
The maid did down the walls with a duster. 女佣用掸帚由上而下地刷除四壁上的尘垢。
Bind down the ropes around the load on the lorry. 把绕在卡车上货物外面的绳子扎紧。
He was not a man to sit down with affront. 他并不是一个可以忍受当众侮辱的人。
One of the fishing boats sank down astern of us. 有一艘渔船在我们后面沉没了。
He slicks his hair down with oil every day. 他每天搽油把头梳得光溜溜的。
The chair sagged down under the fat man's weight. 椅子经这胖人一坐便压弯了。
Our torpedo boats bore down on the enemy cruiser. 我方面鱼雷艇向敌巡洋舰冲去。
Let's clean down the board before we paint it. 让我们在上漆以前把这块板洗干净。
She cast her eyes down to avoid direct eye contact. 她垂下双目以避免对视。

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