困难地，吃力地
1. 艰难地：voyage n. 航行,旅行 | with difficulty 艰难地 | with amazement惊奇地
2. 吃力地：by land 走陆路,由陆路 | with joy 高兴地 | with difficulty 吃力地
3. 费劲地;困难地：without difficulty 毫不费力地 | with difficulty 费劲地;困难地 | do sth with\without difficulty 做某事有\无困难
4. 困难地：with care 仔细地 | with difficulty 困难地 | with confidence 自信地