I felt my heart collapse but my mind was a blank: I was in complete shock.

我觉得我的心碎了但我脑中一片空白：我完全震住了。

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After the last drug, the drug serum and the blank serum were separated from heart blood by centrifugation.

末次给药后无菌心脏取血，离心分离出含药血清和空白血清。

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People liked this, but in another study that measured heart-rate recovery from stress, the HDTVs were shown to be worthless, no better than staring at a blank wall.

人们喜欢这种安排，但是，另一项研究测量了从压力情绪复原的过程中心率的恢复情况，结果显示高清电视机没什么用，并不比盯着空白的墙面效果更好。

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The heart of the product is the BoardX Motherboard, essentially a blank slate with a mini solderless breadboard and a host of ports for plugging in add-ons.

ENGADGET: Insert Coin: BoardX is an open-source, modular motherboard for prolific prototypers

She lay very still, her heart pounding, her body bathed in sweat and the smell of him, her brain blank, oblivious of her surroundings.

NEWYORKER: Pumpkin Head