4 sentences

1. 中国的地形在西部高，东部低。

   zhōng​guó de dì​xíng zài xī​bù gāo, dōng​bù dī.

   China's terrain is high in the west and low in the east.

   Source: CCMatrix

2. 阿拉斯加是最东部和最西部的州。

   ā​lā​sī​jiā shì zuì dōng​bù hé zuì xī​bù de zhōu.

   Alaska is the easternmost and westernmost state.

   Source: CCMatrix

3. 南极洲东部由于海拔较高，比南极洲西部寒冷。

   nán​jí​zhōu dōng​bù yóu​yú hǎi​bá jiào​gāo, bǐ nán​jí​zhōu xī​bù hán​lěng.

   East Antarctica is colder than West Antarctica because of its higher elevation.

   Source: UM-Corpus: Education

4. 我还是在东部时间。

   wǒ hái​shi zài dōng​bù​shí​jiān.

   I'm still on eastern time.

   Source: CCMatrix