When baby phonate, parents can repeat children's voice, and looked at the baby face smiling.

当婴儿出声时，父母也可以重复儿童的声音，并望着婴儿的脸蛋微笑。

T he obtained data show that:the complex of humic acid and sodium-lignosul phonate can elevate the discharge capacity and rechargeable acceptance ability of lead-acid battery;

试验数据表明：当采用木素磺酸钠为膨胀剂时，最好与腐殖酸复合，这样可提高电池的放电容量和充电接受能力；