GRE：核心詞組之in the presence of

in the presence of 在……面前
    釋義
    You use in the presence of when that thing is present.
    例句
    Crying in the presence of a single other person is more helpful than crying alone to ease emotion.
    GRE
    A low number of algal cells in the presence of a high number of grazers suggested, but did not prove, that the grazers had removed most of the algae.
    在擁有大量食草類動物的環(huán)境中藻類細(xì)胞的數(shù)量很低，這表明這樣一種可能——但不能證明：食草類動物消滅了大部分的藻類。