1. stay near;watch and care for 守護照料
Mother sat by her sick baby all night. 母親通宵在生病的嬰兒身邊照料。
2. observe but fail to act as needed 袖手旁觀
Even when his daughter was in trouble,he just sat by and did not help. 即使他女兒陷入困境時,他也袖手旁觀不予支援。
Don't just sit idly by while the other children are all busy. 別的孩子都正忙著,你不要閒著什麼也不幹。