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1.It seems like common sense to most parents to make sure their baby is always in a clean place.
make sure把事情弄清楚，核实或查明某事物
They want to make sure the newcomers don't get a look-in.
他们不想让新人有露脸的机会。
2.Exposing small kids to dirt helps them to build their immune system.
expose to暴露于
Don't expose it to the sun.
谨防日晒。
3.Gilbert says it is OK to eat something that fell on the floor as long as the floor isn't really dirty.
as long as只要；如果
As long as I deliver the goods, my boss is very happy.
只要我做好本职工作，我的老板就很高兴。
