there is a lack of造句
(31) There is a lack of conference control module in the definition of SIP. So, there is great meaning and value in studying teleconference system based on SIP.
(32) This is still not allowed in China, thus there is a lack of supervision.
(33) In particular, there is a lack of understanding of processes occurring at the atomic level of interfaces, and how those processes influence the global material behavior.
(34) And in addition, we know thiazide diuretics can prevent osteoporosis, especially in northern Europe, there is a lack of sunshine, so some elderly women have osteoporosis, and we have to protect them.
(35) Since there is a lack of essential data, this thesis makes the research and reasoning.
(36) Because there is a lack of fossil and chronologic data, the stratigraphic division is still disputed.
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