Insectpestsareamongtheleadingcausesofcropfailure.
Whencarbonisaddedtoironintheproperproportions,theresultissteel.
AlthoughtheCarbon14methodofdatingoldobjectsisnotfoolproof,itisthebestmethodavailableatpresent
TheeconomyofDallas,Texas,isstronganddiversified.
Alligatorsstillexistinsomeofthedank潮湿swampsandbayous小海湾ofAlabama'scoastalregions.
Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.