BUDGET TIP: If you're keen to do some cheap sightseeing, London Bus Route 4 is a good one to catch.

温馨贴士：如果你很享受观光的乐趣，乘坐公交4路是个不错的选择。

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BUDGET TIP: If you're keen to do some cheap sightseeing, London Bus Route 4 is a good one to catch.

温馨贴士：如果你很享受观光的乐趣，乘坐公交4路是个不错的选择。

youdao