1.Peopleusuallygotoparktoplanttreesinoneday人们通常在这一天去公园植树2.Allofusshouldprotecttrees,whichwillmakethe
ifiwereaboyagain,iwouldpracticeperseverancemoreoften,andnevergiveupathingbecauseitwasorinconvenient.
比如,看看Longman词典对student和teacher的定义是很有意思的:Astudentisapersonwhoisstudyingataplaceofeducationortraining.