这个 / 孩子 / 很 / 怯生 / 一 / 见到 / 陌生人 / 就 / 躲 / 到 / 妈妈 / 身后这个孩子很怯生,一见到陌生人就躲到妈妈身后。This child is very shy around strangers; as soon as he sees a stranger, he hides behind his mother.