AlthoughtheCarbon14methodofdatingoldobjectsisnotfoolproof,itisthebestmethodavailableatpresent

---Youcouldalwaysputthedecisionoffalittlebitlonger.

---_____IfIleaveitmuchlongerImightmissmychance.

Incalculatingthedailycalorierequirementsforanindividual,variationsinbodysize,physicalactivity,andageshouldbetakenintoaccount.

Withlasersscientistscanprobemanyphysicalprocesses,suchascombustion,oncebeyondourken.视野

简述影响识记效果的因素。