They change sugar into acids, which break down the tooth's harder outer covering.
它们把糖转化成酸，酸会腐蚀较硬的牙齿外层。
They are to carry the curtains of the tabernacle, the Tent of Meeting, its covering and the outer covering of hides of sea cows, the curtains for the entrance to the Tent of Meeting.
他们要抬帐幕的幔子和会幕，并会幕的盖，与其上的海狗皮和会幕的门帘。
Language is the physical outer covering of thought. The linguistic organization and expression are restricted by logic.
语言是思维的物质外壳，语言的组织和表达都要受逻辑的制约。
Plastic class: Computer outer covering, monitor outer covering.
塑料制品模具：计算机外壳，电脑显示器外壳。
The cells of an animal have a bag-like outer covering, called a membrane.
动物细胞有一个口袋状的外层，叫细胞膜。
Component structure of the outer covering and flight surfaces of all modern birds.
现代鸟类体表和翼面覆盖的结构。
The outer covering of the egg is waterproofed to prevent the embryo from drying out.
鸡蛋的外壳是不透水的，防止胚胎失水。
The small explosion-proof electric appliance outer covering guards against the explosion of the important parts in the electric equipment.
小型防爆电器外壳是防爆电器设备中重要的防爆部件，其品质状态直接关系到厂矿企业的生产安全。
The scene operation part of the text platform contains the operation board, the outer covering, the measuring instrument as well as the jig part.
本试台现场操作部分由操作面板、外壳、测试仪器以及夹具部分组成。
Material: the outer covering USES the high quality aluminum material extrusion formation, Surface after frosting oxidized. Has the high diffuse reflection efficiency characteristic.
产品说明：材料：外壳采用优质铝材挤压成型，表面经磨砂氧化处理。具有高漫反射效率的特点。
Shoe: Outer covering for the foot, usually of leather, with a stiff or thick sole and heel, and generally reaching no higher than the ankle (unlike a boot).
鞋：人脚的保护性外套，通常以皮革制成，具有坚厚鞋底和鞋根，高度一般不超过足踝(与靴类有别)。
Shoe: Outer covering for the foot, usually of leather, with a stiff or thick sole and heel, and generally reaching no higher than the ankle (unlike a boot).
鞋：人脚的保护性外套，通常以皮革制成，具有坚厚鞋底和鞋根，高度一般不超过足踝(与靴类有别)。
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