解释下列语句中划线词的意思。

①瓤肉莹白如冰雪，浆液甘酸如醴酪

②大略如彼，其实过之

Bob Smith is a little boy. On the first day at school, his teacher, Ms. Green, teaches him three words—you, he and I. Then the teacher says, “I am your teacher. You are my student. He is your classmate.”
 When school is over, Bob goes home. His mother asks him,“What does your teacher teach you today?”Bob says with a smile,“Listen, Mom. I am your teacher, you are my student and he is your classmate.”His mother says,“No, dear. You are wrong.”Then she says, “I am your mother. You are my son. He is your father.”
 The next morning at school, Bob’s teacher asks Bob to make sentences with the words “you, he and I”. Bob stands up and says, “I am your mother. You are my son. He is your father.”

民族精神始终是鼓舞中华民族迎难而上、团结互助、战胜强敌与困难的不竭力量之源。下列民族精神形成于新民主主义革命时期的是（   ）

蜻蜓点水是为了（   ）