例句與造句

1. Another line of evidence was found in the fossilized remains of ground beetles dating back to 25, 742 22, 988 years BP . Because these beetles are normally associated with tree line habitats, their location suggests an altitudinal tree limit during the glacial period.
2. Boulder grooves ( large stone sorted stripes two to four meters wide and eighty meters long ), till ridges and numerous glacial valleys, such as the Togona Valley on the northeast facing slopes of the Sanetti Plateau, provide evidence of the ice-age effects on the landscape of BMNP . Until the beginning of deglaciation ( 13, 000 to 14, 000 years ago ) the snowline was at 3, 700 meters and the upper tree limit in the Bale Mountains was well below 3, 000 meters.
3. It's difficult to find tree limit in a sentence. 用tree limit造句挺難的