This week UNESCO held its annual World Heritage convention in Istanbul.

本周联合国教科文组织（UNESCO）在伊斯坦布尔召开世界遗产公约年会。

youdao

This week UNESCO held its annual World Heritage convention in Istanbul.

本周联合国教科文组织（UNESCO）在伊斯坦布尔召开世界遗产公约年会。

youdao