词汇	同位素比率
释义	同位素比率医isotope ratio
随便看	the summer session the summersolstice the sum of our experience the sum of recognized accomplishments the sum of things the sum of this book The sum of three plus two is equal to five the sum to be subbed the Sunday edition the sunday express the sunday mirror The Summer Solstice The summer soybean the summer squash The summer storm laid the crops The summers turned to years the summer sun the summer vac the summer vacation the summer vacation/holidays The summer vacation is approaching The summer went that way the summer/winter solstice the summit declaration The summit finished in a dead end