例句與造句

1. Both " unit stratotype " and " boundary stratotype " can be carried out equally , but it is better firstly to set up " boundary stratotype " if a suitable section could be found
   陸相層型可以“單位層型”與“界線層型”建立并舉，有條件的地質(zhì)斷代還是要重視建立“界線層型” 。
2. It's difficult to find boundary stratotype in a sentence. 用boundary stratotype造句挺難的