This week, as both leaders made simultaneous official visits to China, care was taken to keep a much greater distance between them.
分析：
1 本句是一個(gè)時(shí)間狀語從句
2 句子的主干是care was taken，主句是被動(dòng)語態(tài)
3 前面的as... to China是從句部分
參考譯文：
本周，兩國(guó)領(lǐng)導(dǎo)人同時(shí)對(duì)中國(guó)進(jìn)行正式訪問，但是他們非常小心地保持很遠(yuǎn)地距離。
