At present , we can not undertake to entertain your order owning to the uncertain availability of raw materials 我方無法確定原料供應(yīng)量是否充足,所以目前我們不能接受貴方的訂單。
In addition to availability of raw materials , other factors narrowing the choice of composition are glass color , workability , meltability , and sometimes , chemical durability of the glass 除了原材料的可獲得性以外,其他因素也限制了玻璃組分的選擇,如玻璃顏色、可加工性和可熔性,在某些時候,還需考慮玻璃的化學(xué)耐久性能。