forms of existence的用法和樣例：
例句
- Chloramphenicol palmitate has two forms, but only one sufficiently dissolves and is absorbed to be clinically useful.
棕櫚酸氯黴素有兩種存在形態，但只有一種形態能充分溶解吸收，也因而被臨床使用。 - The paper researched the influence of humic acids on the existing form of heavy metals in Yongzhou copper mine and Chejiang copper mine contaminated tailing soils.
實驗研究了腐殖酸對永州銅礦山和衡陽車江銅礦中重金屬存在形態的影響。
