People who do not sleep enough tend to become irritable .
A、easilyannoyedA
暂无解析
Someseaurchins海胆havevenomous(toxin)spines
Although the Carbon 14 method of dating old objects is not foolproof , it is the best method available at present
Insectpestsareamongtheleadingcausesofcropfailure.
Withlasersscientistscanprobemanyphysicalprocesses,suchascombustion,oncebeyondourken.视野
Formulatedin1823,theMonroeDoctrineassertedthattheAmericaswerenolongeropentoEuropeancolonization.
