OMI allows scientists to assess how much ozone is present at various altitudes—particularly the stratosphere—and near the ground.
依据它的测量数据，科学家们可以估定在地面附近和其它海拔高度有多少臭氧存在——特别是平流层。
The singer and actor is present at the press conference.
那位歌手兼演员出席了记者招待会。
As you can readily observe in the behavior of a baby, the Id is present at birth.
如果你观察宝宝的行为，本我是与生俱来的。
Fructosyltransferase is a kind of enzyme, which catalyzes the synthesis of fructan when sucrose is present at environment.
果糖基转移酶是口腔细菌细胞外多糖合成酶之一，它以蔗糖为底物催化合成果聚糖。
The id, according to Freud, is present at birth.
本我，根据弗洛依德，是与生俱来。
The id, according to Freud, is present at birth.
本我，根据弗洛依德，是与生俱来。
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