Helpfulness
n. 有益；有助
✅ 同义词
📖 牛津释义
helpfulness
n [U].
🗣️ 情景例句
Would tomorrow be OK?
明天可以吗？
We must not lie down,and cry,God help us.
求神不如求己。
the waters flow more quietly, and in the end, without any visible break,
河水流得平缓起来，最后连绵不断地