Under the agreement, releases of cancer-causing chemicals will be cut by about 80 percent.
根据这个协议,致癌化学物的释放将被削减80%左右。
These last changes protect the cells against cancer-causing substances.
这些新的转变会保护细胞,抵御致癌物质入侵。
Cigarettes are not only packed with cancer-causing chemicals - they also disarm the lungs' natural defense system.
香烟不仅仅含有致癌的化学物质,同时破坏肺天然的保护系统。
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