but if in cautiously
但如果小心翼翼
以上为机器翻译结果，长、整句建议使用 人工翻译 。
His gratitude was measureless. Now he turned in his tracks, between the walls of sumach bushes—turned himself as carefully as if he were a ship—and then stepped quickly but cautiously along.
他感到谢天谢地，现在他退回到两堵墙似的绿树之间的小道上，转身时非常小心，好像是一艘船在调头——然后步伐敏捷而又谨慎地往回走去。
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