对于这类人,汉语中有一个形象的说法——“骑墙派”。
“骑墙”字面意思是“to sit with your legs on either side of the fence”,与英文“sit on a fence”含义相近,都表示“犹豫不决,采取观望态度(straddle)”。带有贬义色彩。
当争议发生时,“骑墙派”通常立场中立,两方面都讨好,不想得罪任何一方(support both sides in a disagreement because they do not want to annoy or offend either side)。
例句:
你不能再骑墙观望了——你必须决定支持谁。
You can't sit on the fence any longer - you have to decide whose side you're on.