The primitie mouth, or stomodeum, is a slight depression on the surface of the ectoderm.
原始的口(或口凹)是外胚层表面的一个轻微的凹
。
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About 700,000 children in Mexico dropped out of school last year as recession-stricken families pushed kids to work, and a weak economic recovery will allow only a slight improvement in the drop-out rate in 2010, a top education official said.
高级教育官说,墨西哥去年大约有700,000个孩子因为受

景气的影响而被家人逼去工作,微弱的
复苏将对2010年的辍学率只带来轻微的好转。

学人(汇总) 

Though it's not known exactly where the mutated virus first appeared, it was first identified in South Africa, and the doctor who made that identification says omicron symptoms were quote " extremely mild" in the initial patients she saw.
尽管目前还
知道变异病毒首次出现的确切位置,但它首先在南非被发现,并且,发现它的医生指出,她最早见到的这类患者只表现出“极其轻微”的症状。
