There's no lag period, and notice that antibody levels start rising right away after the second exposure.

没有迟滞期，注意抗体水平在第二次接触后立即开始上升。

youdao

Each image is a 20-second exposure.

每张图片有20秒曝光时间。

youdao

The blur is courtesy of a one-second exposure.

模糊是曝光一秒钟的结果。

youdao

To accurately assess the level of second-hand smoke exposure, researchers tested for cotinine, which is produced when nicotine is metabolized.

VOA: standard.2010.06.15

Memory cells are long lasting cells that remember this exposure and can respond very quickly on second exposure.

记忆细胞可以长时间记忆与抗原的接触,并在再次免疫中迅速做出应答

耶鲁公开课 - 生物医学工程探索课程节选

One is there's no lag period, notice that antibody levels start rising right away after the second exposure.

第一是没有迟滞期,请注意,抗体浓度迅速上升,在第二次接触抗原时

耶鲁公开课 - 生物医学工程探索课程节选

Mr. TODOROV: One-second exposure to the two faces is sufficient to form the inference.

NPR: Scientists Search for that Winning Look

The second is exposure to dangerous pesticides used during the conflict.

CNN: Gulf War illness is real, new federal report says

Of these two strategies, I find the least expensive and most flexible solution is to create a style tilt using two separate funds, one that provides cheap beta exposure and a second that provides concentrated exposure to value stocks.

FORBES: Investing in Style with Index Funds