soft landing

landing of a spacecraft (eg on the moon) that avoids damage or destruction 软着陆（航天器着陆而不受损, 如着陆於月球时）.

sock, socket, sod, soda, soda siphon, soda-fountain, soda-water, sodden, sodding, sodium, sodium carbonate (also `washing soda), sodium chloride, sodium hydroxide (also ,caustic `soda), sodomite, sodomy, sofa, soft, soft currency, soft drug, soft fruit, soft option, soft palate, soft porn, soft shoulder, soft soap, soft-boiled, soft-drink, soft-hearted, soft-heartedness, soft-pedal, soft-soap, soft-spoken, softball, soften, softener, softish, softly, softness, software, softwood,