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| teeter on the brink of (bookworm); teeter on the brink (Vanda Voytkevych); teeter on the edge of (Anglophile); hang in balance (Taras) | |||
| teeter on the edge (Val_Ships); teeter on the brink (or edge; His voice teetered on the edge of hysteria. Val_Ships) | |||
| flirt with (Ремедиос_П); play it close to the edge (Ремедиос_П) | |||
| sail close to the wind (Yeldar Azanbayev) | |||
| балансировать на грани: 18 a las frases, 7 temas |
| Ajedrez | 1 |
| Diplomacia | 1 |
| Finanzas | 1 |
| General | 6 |
| Idiomático | 2 |
| Makárov | 4 |
| Término militar | 3 |