游览巴黎时，在必不可少的埃菲尔铁塔前拍照是必须的。

When visiting Paris, taking a photo at the ___obligatory Eiffel Tower is a must.

这次旅行包含了参观博物馆看名画的照例停留。

The tour includes an ___obligatory stop at the museum to see the famous painting.

漫长的会议结束后，便是大家预料之中的例行集体照环节。

After the long meeting came the ___obligatory group photo that everyone expected.